Find the proportion: 13/63=x/189

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.