Finding the Third Proportional to 9,139.50 and 19,666.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.50 : 19,666.13 = 19,666.13 : x
2. Step 2: Convert to fraction form
   9,139.50/19,666.13 = 19,666.13/x
3. Step 3: Cross multiply
   9,139.50x = 19,666.13 × 19,666.13
4. Step 4: Simplify right side
   9,139.50x = 386,756,472.52
5. Step 5: Solve for x
   x = 386,756,472.52/9,139.50
6. Step 6: Final answer
   x = 42,317.03