Finding the Third Proportional to 28,659 and 62,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,659 : 62,839.50 = 62,839.50 : x
2. Step 2: Convert to fraction form
   28,659/62,839.50 = 62,839.50/x
3. Step 3: Cross multiply
   28,659x = 62,839.50 × 62,839.50
4. Step 4: Simplify right side
   28,659x = 3,948,802,760.25
5. Step 5: Solve for x
   x = 3,948,802,760.25/28,659
6. Step 6: Final answer
   x = 137,785.78