Finding the Third Proportional to 3,647,146 and 8,442,493

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,146 : 8,442,493 = 8,442,493 : x
2. Step 2: Convert to fraction form
   3,647,146/8,442,493 = 8,442,493/x
3. Step 3: Cross multiply
   3,647,146x = 8,442,493 × 8,442,493
4. Step 4: Simplify right side
   3,647,146x = 71,275,688,055,049
5. Step 5: Solve for x
   x = 71,275,688,055,049/3,647,146
6. Step 6: Final answer
   x = 19,542,866.68