The triangle bisector theorem states if a ray bisects an angle of a triangle, then it divides the opposite side of the triangle into segments that are proportional to the other two sides, therefore:
![(x)/(8.7)=(16.4)/(11.5)](https://img.qammunity.org/2023/formulas/mathematics/college/7tesme6jtfpk401rwsvem7b27fxm9v4gnn.png)
Solve for x:
Multiply both sides by 8.7:
![\begin{gathered} 8.7\cdot(x)/(8.7)=8.7\cdot(16.4)/(11.5) \\ x\approx12.41 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/2vr02cfca08odcjqcncqawf7uswke0h7wx.png)
Answer:
x = 12.41