Finding the Fourth Proportional to 1,105.02, 1,658.32 and 831.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.02 : 1,658.32 = 831.84 : x
2. Step 2: Convert to fraction form
   1,105.02/1,658.32 = 831.84/x
3. Step 3: Cross multiply
   1,105.02x = 1,658.32 × 831.84
4. Step 4: Simplify right side
   1,105.02x = 1,379,456.91
5. Step 5: Solve for x
   x = 1,379,456.91/1,105.02
6. Step 6: Final answer
   x = 1,248.35