Finding the Third Proportional to 3,366,540 and 7,172,838

Step by Step Solution

1. Step 1: Write the proportion equation
   3,366,540 : 7,172,838 = 7,172,838 : x
2. Step 2: Convert to fraction form
   3,366,540/7,172,838 = 7,172,838/x
3. Step 3: Cross multiply
   3,366,540x = 7,172,838 × 7,172,838
4. Step 4: Simplify right side
   3,366,540x = 51,449,604,974,244
5. Step 5: Solve for x
   x = 51,449,604,974,244/3,366,540
6. Step 6: Final answer
   x = 15,282,635.87