Finding the Third Proportional to 3,930,243 and 8,491,569

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930,243 : 8,491,569 = 8,491,569 : x
2. Step 2: Convert to fraction form
   3,930,243/8,491,569 = 8,491,569/x
3. Step 3: Cross multiply
   3,930,243x = 8,491,569 × 8,491,569
4. Step 4: Simplify right side
   3,930,243x = 72,106,744,081,761
5. Step 5: Solve for x
   x = 72,106,744,081,761/3,930,243
6. Step 6: Final answer
   x = 18,346,637.62