Finding the Third Proportional to 3,391,540 and 7,187,432

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391,540 : 7,187,432 = 7,187,432 : x
2. Step 2: Convert to fraction form
   3,391,540/7,187,432 = 7,187,432/x
3. Step 3: Cross multiply
   3,391,540x = 7,187,432 × 7,187,432
4. Step 4: Simplify right side
   3,391,540x = 51,659,178,754,624
5. Step 5: Solve for x
   x = 51,659,178,754,624/3,391,540
6. Step 6: Final answer
   x = 15,231,776.35