Finding the Third Proportional to 3,647,122 and 8,442,436

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,122 : 8,442,436 = 8,442,436 : x
2. Step 2: Convert to fraction form
   3,647,122/8,442,436 = 8,442,436/x
3. Step 3: Cross multiply
   3,647,122x = 8,442,436 × 8,442,436
4. Step 4: Simplify right side
   3,647,122x = 71,274,725,614,096
5. Step 5: Solve for x
   x = 71,274,725,614,096/3,647,122
6. Step 6: Final answer
   x = 19,542,731.40