Finding the Third Proportional to 3,998,568 and 8,707,056

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998,568 : 8,707,056 = 8,707,056 : x
2. Step 2: Convert to fraction form
   3,998,568/8,707,056 = 8,707,056/x
3. Step 3: Cross multiply
   3,998,568x = 8,707,056 × 8,707,056
4. Step 4: Simplify right side
   3,998,568x = 75,812,824,187,136
5. Step 5: Solve for x
   x = 75,812,824,187,136/3,998,568
6. Step 6: Final answer
   x = 18,959,993.72