MathNet 2021 — Part 08 Question 44

The diagonals $AC$ and $BD$ of trapezoid $ABCD$ intersect at $E$ and divide it into four triangles of areas $25\,\mathrm{cm}^2$, $36\,\mathrm{cm}^2$, $X\,\mathrm{cm}^2$, and $X\,\mathrm{cm}^2$, as shown. What is $X$?