Finding the Fourth Proportional to 2,562.72, 3,843.66 and 831.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.72 : 3,843.66 = 831.12 : x
2. Step 2: Convert to fraction form
   2,562.72/3,843.66 = 831.12/x
3. Step 3: Cross multiply
   2,562.72x = 3,843.66 × 831.12
4. Step 4: Simplify right side
   2,562.72x = 3,194,542.70
5. Step 5: Solve for x
   x = 3,194,542.70/2,562.72
6. Step 6: Final answer
   x = 1,246.54