How to find the missing side of two similar triangles

The video tutorial covers the concept of similar triangles, explaining how they are proportional to each other. It discusses the properties and lengths of triangles, and how to identify proportional relationships. The tutorial also demonstrates solving equations to find unknown values in triangles, and concludes with a review and addressing student questions.

Explain the process of cross-multiplying in the context of similar triangles.

What steps would you take to solve for X in the equation derived from the similar triangles?