Finding the Third Proportional to 60,687 and 129,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   60,687 : 129,028.50 = 129,028.50 : x
2. Step 2: Convert to fraction form
   60,687/129,028.50 = 129,028.50/x
3. Step 3: Cross multiply
   60,687x = 129,028.50 × 129,028.50
4. Step 4: Simplify right side
   60,687x = 16,648,353,812.25
5. Step 5: Solve for x
   x = 16,648,353,812.25/60,687
6. Step 6: Final answer
   x = 274,331.47