Finding the Fourth Proportional to 2,391.53, 3,588.17 and 1,158.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.53 : 3,588.17 = 1,158.30 : x
2. Step 2: Convert to fraction form
   2,391.53/3,588.17 = 1,158.30/x
3. Step 3: Cross multiply
   2,391.53x = 3,588.17 × 1,158.30
4. Step 4: Simplify right side
   2,391.53x = 4,156,171.52
5. Step 5: Solve for x
   x = 4,156,171.52/2,391.53
6. Step 6: Final answer
   x = 1,737.88