Get nth most recent date?

Hi all,

Does anyone know how to leverage DAX to get the nth most recent date in a series, given drop-down selection of currentDate and drop-down selection of numberPeriods?

Here's some sample data:

Note: Data will not always be quarterly. Any date is possible in the [Date] column. So, I do NOT want to use a pre-built Time Intelligence function like PREVIOUSMONTH() or PREVIOUSQUARTER(). It will fail if the intervals between the dates are not consistent, which is what I expect to happen. I'm getting stuck because I will not necessarily have a consistent delta between time intervals, so I can't really use functions like DATEADD() either.

So if the user selects 5/31/2023, and 3rd most recent date, the measure should return 9/30/22.

The only way I know to do this is have:

VAR currentDate = SELECTEDVALUE([Date])

VAR nextMostRecent = CALCULATE(MAX('Table'[Date]), ALL('Table'), 'Table'[Date] < currentDate)

VAR nextNextMostRecent = CALCULATE(MAX('Table'[Date]), ALL('Table'), 'Table'[Date] < nextMostRecent)

-- And so on for older and older dates

But this only works if it's the next most recent date to current date. To get older and older dates, I have to hardcode, which is not viable. How can I do this in a flexible manner? I need it so that the intervals between the dates is not considered, only the fact that it is n periods older - all dates can be assumed to be unique.

Thanks!