Finding the Third Proportional to 3,647,130 and 8,442,457

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647,130 : 8,442,457 = 8,442,457 : x
2. Step 2: Convert to fraction form
   3,647,130/8,442,457 = 8,442,457/x
3. Step 3: Cross multiply
   3,647,130x = 8,442,457 × 8,442,457
4. Step 4: Simplify right side
   3,647,130x = 71,275,080,196,849
5. Step 5: Solve for x
   x = 71,275,080,196,849/3,647,130
6. Step 6: Final answer
   x = 19,542,785.75