Finding the Third Proportional to 133,687 and 285,414.50

Step by Step Solution

1. Step 1: Write the proportion equation
   133,687 : 285,414.50 = 285,414.50 : x
2. Step 2: Convert to fraction form
   133,687/285,414.50 = 285,414.50/x
3. Step 3: Cross multiply
   133,687x = 285,414.50 × 285,414.50
4. Step 4: Simplify right side
   133,687x = 81,461,436,810.25
5. Step 5: Solve for x
   x = 81,461,436,810.25/133,687
6. Step 6: Final answer
   x = 609,344.49