Finding the Third Proportional to 636,605 and 865,096

Step by Step Solution

1. Step 1: Write the proportion equation
   636,605 : 865,096 = 865,096 : x
2. Step 2: Convert to fraction form
   636,605/865,096 = 865,096/x
3. Step 3: Cross multiply
   636,605x = 865,096 × 865,096
4. Step 4: Simplify right side
   636,605x = 748,391,089,216
5. Step 5: Solve for x
   x = 748,391,089,216/636,605
6. Step 6: Final answer
   x = 1,175,597.25