Finding the Third Proportional to 3,940,682 and 8,489,268

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,682 : 8,489,268 = 8,489,268 : x
2. Step 2: Convert to fraction form
   3,940,682/8,489,268 = 8,489,268/x
3. Step 3: Cross multiply
   3,940,682x = 8,489,268 × 8,489,268
4. Step 4: Simplify right side
   3,940,682x = 72,067,671,175,824
5. Step 5: Solve for x
   x = 72,067,671,175,824/3,940,682
6. Step 6: Final answer
   x = 18,288,121.49