Finding the Fourth Proportional to 1,581.39, 2,183.90 and 1,085.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.39 : 2,183.90 = 1,085.27 : x
2. Step 2: Convert to fraction form
   1,581.39/2,183.90 = 1,085.27/x
3. Step 3: Cross multiply
   1,581.39x = 2,183.90 × 1,085.27
4. Step 4: Simplify right side
   1,581.39x = 2,370,104.81
5. Step 5: Solve for x
   x = 2,370,104.81/1,581.39
6. Step 6: Final answer
   x = 1,498.75