Finding the Fourth Proportional to 2,686.50, 4,029.57 and 738.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.50 : 4,029.57 = 738.72 : x
2. Step 2: Convert to fraction form
   2,686.50/4,029.57 = 738.72/x
3. Step 3: Cross multiply
   2,686.50x = 4,029.57 × 738.72
4. Step 4: Simplify right side
   2,686.50x = 2,976,723.95
5. Step 5: Solve for x
   x = 2,976,723.95/2,686.50
6. Step 6: Final answer
   x = 1,108.03