Finding the Fourth Proportional to 2,391.20, 3,586.04 and 1,658.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.20 : 3,586.04 = 1,658.56 : x
2. Step 2: Convert to fraction form
   2,391.20/3,586.04 = 1,658.56/x
3. Step 3: Cross multiply
   2,391.20x = 3,586.04 × 1,658.56
4. Step 4: Simplify right side
   2,391.20x = 5,947,662.50
5. Step 5: Solve for x
   x = 5,947,662.50/2,391.20
6. Step 6: Final answer
   x = 2,487.31