Finding the Fourth Proportional to 2,391.62, 3,587.29 and 747.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.62 : 3,587.29 = 747.72 : x
2. Step 2: Convert to fraction form
   2,391.62/3,587.29 = 747.72/x
3. Step 3: Cross multiply
   2,391.62x = 3,587.29 × 747.72
4. Step 4: Simplify right side
   2,391.62x = 2,682,286.61
5. Step 5: Solve for x
   x = 2,682,286.61/2,391.62
6. Step 6: Final answer
   x = 1,121.54