Finding the Third Proportional to 636,605 and 865,096.50

Step by Step Solution

1. Step 1: Write the proportion equation
   636,605 : 865,096.50 = 865,096.50 : x
2. Step 2: Convert to fraction form
   636,605/865,096.50 = 865,096.50/x
3. Step 3: Cross multiply
   636,605x = 865,096.50 × 865,096.50
4. Step 4: Simplify right side
   636,605x = 748,391,954,312.25
5. Step 5: Solve for x
   x = 748,391,954,312.25/636,605
6. Step 6: Final answer
   x = 1,175,598.61