Finding the Fourth Proportional to 1,081.96, 1,491.39 and 819.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.96 : 1,491.39 = 819.52 : x
2. Step 2: Convert to fraction form
   1,081.96/1,491.39 = 819.52/x
3. Step 3: Cross multiply
   1,081.96x = 1,491.39 × 819.52
4. Step 4: Simplify right side
   1,081.96x = 1,222,223.93
5. Step 5: Solve for x
   x = 1,222,223.93/1,081.96
6. Step 6: Final answer
   x = 1,129.64