Finding the Fourth Proportional to 1,494.20, 2,061.88 and 831.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,494.20 : 2,061.88 = 831.08 : x
2. Step 2: Convert to fraction form
   1,494.20/2,061.88 = 831.08/x
3. Step 3: Cross multiply
   1,494.20x = 2,061.88 × 831.08
4. Step 4: Simplify right side
   1,494.20x = 1,713,587.23
5. Step 5: Solve for x
   x = 1,713,587.23/1,494.20
6. Step 6: Final answer
   x = 1,146.83