Finding the Third Proportional to 3,647,142 and 8,442,486

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,142 : 8,442,486 = 8,442,486 : x
2. Step 2: Convert to fraction form
   3,647,142/8,442,486 = 8,442,486/x
3. Step 3: Cross multiply
   3,647,142x = 8,442,486 × 8,442,486
4. Step 4: Simplify right side
   3,647,142x = 71,275,569,860,196
5. Step 5: Solve for x
   x = 71,275,569,860,196/3,647,142
6. Step 6: Final answer
   x = 19,542,855.71