Finding the Third Proportional to 3,647,136 and 8,442,471

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,136 : 8,442,471 = 8,442,471 : x
2. Step 2: Convert to fraction form
   3,647,136/8,442,471 = 8,442,471/x
3. Step 3: Cross multiply
   3,647,136x = 8,442,471 × 8,442,471
4. Step 4: Simplify right side
   3,647,136x = 71,275,316,585,841
5. Step 5: Solve for x
   x = 71,275,316,585,841/3,647,136
6. Step 6: Final answer
   x = 19,542,818.42