Finding the Third Proportional to 3,940,704 and 8,489,312

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,704 : 8,489,312 = 8,489,312 : x
2. Step 2: Convert to fraction form
   3,940,704/8,489,312 = 8,489,312/x
3. Step 3: Cross multiply
   3,940,704x = 8,489,312 × 8,489,312
4. Step 4: Simplify right side
   3,940,704x = 72,068,418,233,344
5. Step 5: Solve for x
   x = 72,068,418,233,344/3,940,704
6. Step 6: Final answer
   x = 18,288,208.97