Finding the Third Proportional to 3,542,612 and 5,639,728

Step by Step Solution

1. Step 1: Write the proportion equation
   3,542,612 : 5,639,728 = 5,639,728 : x
2. Step 2: Convert to fraction form
   3,542,612/5,639,728 = 5,639,728/x
3. Step 3: Cross multiply
   3,542,612x = 5,639,728 × 5,639,728
4. Step 4: Simplify right side
   3,542,612x = 31,806,531,913,984
5. Step 5: Solve for x
   x = 31,806,531,913,984/3,542,612
6. Step 6: Final answer
   x = 8,978,271.38