Finding the Third Proportional to 3,647,128 and 8,442,451

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,128 : 8,442,451 = 8,442,451 : x
2. Step 2: Convert to fraction form
   3,647,128/8,442,451 = 8,442,451/x
3. Step 3: Cross multiply
   3,647,128x = 8,442,451 × 8,442,451
4. Step 4: Simplify right side
   3,647,128x = 71,274,978,887,401
5. Step 5: Solve for x
   x = 71,274,978,887,401/3,647,128
6. Step 6: Final answer
   x = 19,542,768.69