Finding the Third Proportional to 62,689.50 and 87,864.75

Step by Step Solution

1. Step 1: Write the proportion equation
   62,689.50 : 87,864.75 = 87,864.75 : x
2. Step 2: Convert to fraction form
   62,689.50/87,864.75 = 87,864.75/x
3. Step 3: Cross multiply
   62,689.50x = 87,864.75 × 87,864.75
4. Step 4: Simplify right side
   62,689.50x = 7,720,214,292.56
5. Step 5: Solve for x
   x = 7,720,214,292.56/62,689.50
6. Step 6: Final answer
   x = 123,150.04