Finding the Fourth Proportional to 1,017.41, 1,404.68 and 831.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.41 : 1,404.68 = 831.35 : x
2. Step 2: Convert to fraction form
   1,017.41/1,404.68 = 831.35/x
3. Step 3: Cross multiply
   1,017.41x = 1,404.68 × 831.35
4. Step 4: Simplify right side
   1,017.41x = 1,167,780.72
5. Step 5: Solve for x
   x = 1,167,780.72/1,017.41
6. Step 6: Final answer
   x = 1,147.80