Finding the Fourth Proportional to 2,391.72, 3,586.18 and 929.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.72 : 3,586.18 = 929.16 : x
2. Step 2: Convert to fraction form
   2,391.72/3,586.18 = 929.16/x
3. Step 3: Cross multiply
   2,391.72x = 3,586.18 × 929.16
4. Step 4: Simplify right side
   2,391.72x = 3,332,135.01
5. Step 5: Solve for x
   x = 3,332,135.01/2,391.72
6. Step 6: Final answer
   x = 1,393.20