Finding the Fourth Proportional to 2,391.15, 3,586.59 and 1,158.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.15 : 3,586.59 = 1,158.33 : x
2. Step 2: Convert to fraction form
   2,391.15/3,586.59 = 1,158.33/x
3. Step 3: Cross multiply
   2,391.15x = 3,586.59 × 1,158.33
4. Step 4: Simplify right side
   2,391.15x = 4,154,454.79
5. Step 5: Solve for x
   x = 4,154,454.79/2,391.15
6. Step 6: Final answer
   x = 1,737.43