Reporting the X-Axis value where two line cross

[EricPeabody]

Howdy Team, I've got a table with a column for demand and a column for supply with rows for the end of each year.

I'd like to calculate the date on which the supply and demand lines cross each other and use that date to drive an x-axis constant line: 

I can't just use a calculate to filter the dates down to where two columns equal each other because often (always) the intersection date is in the middle of the year. I'm thinking it might be possible to narrow it down to the right year and then use so kind of proportion to estimate the date. Any ideas on how to implement this in DAX? Thanks!

[lbendlin]

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