Finding the Third Proportional to 636,864 and 1,022,640

Step by Step Solution

1. Step 1: Write the proportion equation
   636,864 : 1,022,640 = 1,022,640 : x
2. Step 2: Convert to fraction form
   636,864/1,022,640 = 1,022,640/x
3. Step 3: Cross multiply
   636,864x = 1,022,640 × 1,022,640
4. Step 4: Simplify right side
   636,864x = 1,045,792,569,600
5. Step 5: Solve for x
   x = 1,045,792,569,600/636,864
6. Step 6: Final answer
   x = 1,642,097.17