Finding the Third Proportional to 3,647,124 and 8,442,440

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,124 : 8,442,440 = 8,442,440 : x
2. Step 2: Convert to fraction form
   3,647,124/8,442,440 = 8,442,440/x
3. Step 3: Cross multiply
   3,647,124x = 8,442,440 × 8,442,440
4. Step 4: Simplify right side
   3,647,124x = 71,274,793,153,600
5. Step 5: Solve for x
   x = 71,274,793,153,600/3,647,124
6. Step 6: Final answer
   x = 19,542,739.20