Finding the Third Proportional to 3,390,456 and 7,439,355

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390,456 : 7,439,355 = 7,439,355 : x
2. Step 2: Convert to fraction form
   3,390,456/7,439,355 = 7,439,355/x
3. Step 3: Cross multiply
   3,390,456x = 7,439,355 × 7,439,355
4. Step 4: Simplify right side
   3,390,456x = 55,344,002,816,025
5. Step 5: Solve for x
   x = 55,344,002,816,025/3,390,456
6. Step 6: Final answer
   x = 16,323,468.82