Finding the Fourth Proportional to 3,831.57, 5,287.17 and 2,339.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831.57 : 5,287.17 = 2,339.91 : x
2. Step 2: Convert to fraction form
   3,831.57/5,287.17 = 2,339.91/x
3. Step 3: Cross multiply
   3,831.57x = 5,287.17 × 2,339.91
4. Step 4: Simplify right side
   3,831.57x = 12,371,501.95
5. Step 5: Solve for x
   x = 12,371,501.95/3,831.57
6. Step 6: Final answer
   x = 3,228.83