Finding the Third Proportional to 3,940,902 and 8,510,508

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,902 : 8,510,508 = 8,510,508 : x
2. Step 2: Convert to fraction form
   3,940,902/8,510,508 = 8,510,508/x
3. Step 3: Cross multiply
   3,940,902x = 8,510,508 × 8,510,508
4. Step 4: Simplify right side
   3,940,902x = 72,428,746,418,064
5. Step 5: Solve for x
   x = 72,428,746,418,064/3,940,902
6. Step 6: Final answer
   x = 18,378,723.05