Finding the Fourth Proportional to 1,081.91, 1,492.20 and 932.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.91 : 1,492.20 = 932.81 : x
2. Step 2: Convert to fraction form
   1,081.91/1,492.20 = 932.81/x
3. Step 3: Cross multiply
   1,081.91x = 1,492.20 × 932.81
4. Step 4: Simplify right side
   1,081.91x = 1,391,931.62
5. Step 5: Solve for x
   x = 1,391,931.62/1,081.91
6. Step 6: Final answer
   x = 1,286.56