Finding the Third Proportional to 648,912 and 868,008

Step by Step Solution

1. Step 1: Write the proportion equation
   648,912 : 868,008 = 868,008 : x
2. Step 2: Convert to fraction form
   648,912/868,008 = 868,008/x
3. Step 3: Cross multiply
   648,912x = 868,008 × 868,008
4. Step 4: Simplify right side
   648,912x = 753,437,888,064
5. Step 5: Solve for x
   x = 753,437,888,064/648,912
6. Step 6: Final answer
   x = 1,161,078.68