Finding the Third Proportional to 108,385.50 and 172,605

Step by Step Solution

1. Step 1: Write the proportion equation
   108,385.50 : 172,605 = 172,605 : x
2. Step 2: Convert to fraction form
   108,385.50/172,605 = 172,605/x
3. Step 3: Cross multiply
   108,385.50x = 172,605 × 172,605
4. Step 4: Simplify right side
   108,385.50x = 29,792,486,025
5. Step 5: Solve for x
   x = 29,792,486,025/108,385.50
6. Step 6: Final answer
   x = 274,875.20