Finding the Third Proportional to 60,129 and 89,677.50

Step by Step Solution

1. Step 1: Write the proportion equation
   60,129 : 89,677.50 = 89,677.50 : x
2. Step 2: Convert to fraction form
   60,129/89,677.50 = 89,677.50/x
3. Step 3: Cross multiply
   60,129x = 89,677.50 × 89,677.50
4. Step 4: Simplify right side
   60,129x = 8,042,054,006.25
5. Step 5: Solve for x
   x = 8,042,054,006.25/60,129
6. Step 6: Final answer
   x = 133,746.68