Finding the Third Proportional to 636,598.50 and 865,086.75

Step by Step Solution

1. Step 1: Write the proportion equation
   636,598.50 : 865,086.75 = 865,086.75 : x
2. Step 2: Convert to fraction form
   636,598.50/865,086.75 = 865,086.75/x
3. Step 3: Cross multiply
   636,598.50x = 865,086.75 × 865,086.75
4. Step 4: Simplify right side
   636,598.50x = 748,375,085,025.56
5. Step 5: Solve for x
   x = 748,375,085,025.56/636,598.50
6. Step 6: Final answer
   x = 1,175,584.12