Finding the Third Proportional to 39,688.31 and 52,909.88

Step by Step Solution

1. Step 1: Write the proportion equation
   39,688.31 : 52,909.88 = 52,909.88 : x
2. Step 2: Convert to fraction form
   39,688.31/52,909.88 = 52,909.88/x
3. Step 3: Cross multiply
   39,688.31x = 52,909.88 × 52,909.88
4. Step 4: Simplify right side
   39,688.31x = 2,799,454,872.52
5. Step 5: Solve for x
   x = 2,799,454,872.52/39,688.31
6. Step 6: Final answer
   x = 70,536.00