How to calculate target by data?

Here is a measure expression that returns the Target for the Date and Group on that row of the table.

GroupDate Target =
VAR __thisdate =
    SELECTEDVALUE ( Sales[Date] )
VAR __thisGroup =
    SELECTEDVALUE ( Sales[Group] )
RETURN
    CALCULATE (
        MAX ( Target[Target Conversation] ),
        ALL ( Target ),
        Target[StartDate] <= __thisdate,
        Target[EndDate] >= __thisdate,
        Target[Group] = __thisGroup
    )

If this works for you, please mark it as the solution.  Kudos are appreciated too.  Please let me know if not.

Regards,

Pat

Perfect, thanks for this solution.