Finding the Fourth Proportional to 1,081.40, 1,494.42 and 818.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.40 : 1,494.42 = 818.96 : x
2. Step 2: Convert to fraction form
   1,081.40/1,494.42 = 818.96/x
3. Step 3: Cross multiply
   1,081.40x = 1,494.42 × 818.96
4. Step 4: Simplify right side
   1,081.40x = 1,223,870.20
5. Step 5: Solve for x
   x = 1,223,870.20/1,081.40
6. Step 6: Final answer
   x = 1,131.75