Finding the Third Proportional to 3,647,128 and 8,442,452

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,128 : 8,442,452 = 8,442,452 : x
2. Step 2: Convert to fraction form
   3,647,128/8,442,452 = 8,442,452/x
3. Step 3: Cross multiply
   3,647,128x = 8,442,452 × 8,442,452
4. Step 4: Simplify right side
   3,647,128x = 71,274,995,772,304
5. Step 5: Solve for x
   x = 71,274,995,772,304/3,647,128
6. Step 6: Final answer
   x = 19,542,773.32