To solve the proportion:
\frac{13}{63} = \frac{x}{189}
1. Cross-multiply to find:
13 \cdot 189 = 63 \cdot x
2. Calculate the left-hand side:
13 \cdot 189 = 2457
3. Set the equation:
2457 = 63x
4. Solve for x:
x = \frac{2457}{63}
5. Simplify the result:
x = 39
The answer is x = 39.