Finding the Fourth Proportional to 2,391.62, 3,587.39 and 748.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.62 : 3,587.39 = 748.15 : x
2. Step 2: Convert to fraction form
   2,391.62/3,587.39 = 748.15/x
3. Step 3: Cross multiply
   2,391.62x = 3,587.39 × 748.15
4. Step 4: Simplify right side
   2,391.62x = 2,683,905.83
5. Step 5: Solve for x
   x = 2,683,905.83/2,391.62
6. Step 6: Final answer
   x = 1,122.21