Finding the Fourth Proportional to 2,391.59, 3,587.72 and 1,157.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.59 : 3,587.72 = 1,157.98 : x
2. Step 2: Convert to fraction form
   2,391.59/3,587.72 = 1,157.98/x
3. Step 3: Cross multiply
   2,391.59x = 3,587.72 × 1,157.98
4. Step 4: Simplify right side
   2,391.59x = 4,154,508.01
5. Step 5: Solve for x
   x = 4,154,508.01/2,391.59
6. Step 6: Final answer
   x = 1,737.13