Finding the Fourth Proportional to 2,391.12, 3,588.30 and 1,158.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.12 : 3,588.30 = 1,158.71 : x
2. Step 2: Convert to fraction form
   2,391.12/3,588.30 = 1,158.71/x
3. Step 3: Cross multiply
   2,391.12x = 3,588.30 × 1,158.71
4. Step 4: Simplify right side
   2,391.12x = 4,157,781.15
5. Step 5: Solve for x
   x = 4,157,781.15/2,391.12
6. Step 6: Final answer
   x = 1,738.84