Need help calculating weighted average

I manually put your sample data in a model, here is the PQ code for that:

// StateAverage
let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8s5LTVXSUTJVitWJVvLILACyDQ2UYmMB", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Procedure = _t, StateAverageLos = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Procedure", type text}, {"StateAverageLos", Int64.Type}})
in
    #"Changed Type"

// Data
let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8krMU9JR8s5LTQVSZkqxOtFKbqlJCCFjsJBvYhFCyAIs5FiAJGQJVVWJEDICC3mVIhlvCBEC2+iRWQA3HWIhRMQMyT6IiDmSdRARUyTbICJGxki2QYRMlGJjAQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Date = _t, Procedure = _t, Procedures = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type text}, {"Procedure", type text}, {"Procedures", Int64.Type}})
in
    #"Changed Type"

After that, create the necessary relationship between the 2 tables:

Then add this measure to the model:

WeightedStateAverageLos = 
VAR vWeightedSum = 
    SUMX ( 
        Data,
        Data[Procedures] * RELATED ( StateAverage[StateAverageLos] )
    )
VAR vCountProcedures = 
    SUM ( Data[Procedures] )
VAR vRetval = 
    DIVIDE ( vWeightedSum, vCountProcedures )
RETURN
    vRetval

This should give you the expected result:

Obviously, to see the months in the correct order, there are more transformation needed, but that's not the scope of your question.