Finding the Fourth Proportional to 2,879.92, 3,974.88 and 1,831.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,879.92 : 3,974.88 = 1,831.78 : x
2. Step 2: Convert to fraction form
   2,879.92/3,974.88 = 1,831.78/x
3. Step 3: Cross multiply
   2,879.92x = 3,974.88 × 1,831.78
4. Step 4: Simplify right side
   2,879.92x = 7,281,105.69
5. Step 5: Solve for x
   x = 7,281,105.69/2,879.92
6. Step 6: Final answer
   x = 2,528.23