Finding the Fourth Proportional to 2,831.05, 4,246.17 and 1,142.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,831.05 : 4,246.17 = 1,142.61 : x
2. Step 2: Convert to fraction form
   2,831.05/4,246.17 = 1,142.61/x
3. Step 3: Cross multiply
   2,831.05x = 4,246.17 × 1,142.61
4. Step 4: Simplify right side
   2,831.05x = 4,851,702.52
5. Step 5: Solve for x
   x = 4,851,702.52/2,831.05
6. Step 6: Final answer
   x = 1,713.75