Finding the Third Proportional to 636,839.50 and 865,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   636,839.50 : 865,345.50 = 865,345.50 : x
2. Step 2: Convert to fraction form
   636,839.50/865,345.50 = 865,345.50/x
3. Step 3: Cross multiply
   636,839.50x = 865,345.50 × 865,345.50
4. Step 4: Simplify right side
   636,839.50x = 748,822,834,370.25
5. Step 5: Solve for x
   x = 748,822,834,370.25/636,839.50
6. Step 6: Final answer
   x = 1,175,842.32