Finding the Third Proportional to 3,391,543 and 7,187,438

Step by Step Solution

1. Step 1: Write the proportion equation
   3,391,543 : 7,187,438 = 7,187,438 : x
2. Step 2: Convert to fraction form
   3,391,543/7,187,438 = 7,187,438/x
3. Step 3: Cross multiply
   3,391,543x = 7,187,438 × 7,187,438
4. Step 4: Simplify right side
   3,391,543x = 51,659,265,003,844
5. Step 5: Solve for x
   x = 51,659,265,003,844/3,391,543
6. Step 6: Final answer
   x = 15,231,788.31