Finding the Third Proportional to 3,342,860 and 7,217,728

Step by Step Solution

1. Step 1: Write the proportion equation
   3,342,860 : 7,217,728 = 7,217,728 : x
2. Step 2: Convert to fraction form
   3,342,860/7,217,728 = 7,217,728/x
3. Step 3: Cross multiply
   3,342,860x = 7,217,728 × 7,217,728
4. Step 4: Simplify right side
   3,342,860x = 52,095,597,481,984
5. Step 5: Solve for x
   x = 52,095,597,481,984/3,342,860
6. Step 6: Final answer
   x = 15,584,139.77