Please help find the answers for this question for 15 points!

The triangles are similar. what is the value of x? show your work.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)