Finding the Fourth Proportional to 2,333.40, 3,498.96 and 831.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,333.40 : 3,498.96 = 831.90 : x
2. Step 2: Convert to fraction form
   2,333.40/3,498.96 = 831.90/x
3. Step 3: Cross multiply
   2,333.40x = 3,498.96 × 831.90
4. Step 4: Simplify right side
   2,333.40x = 2,910,784.82
5. Step 5: Solve for x
   x = 2,910,784.82/2,333.40
6. Step 6: Final answer
   x = 1,247.44