Finding the Fourth Proportional to 1,055.24, 1,581.42 and 928.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.24 : 1,581.42 = 928.52 : x
2. Step 2: Convert to fraction form
   1,055.24/1,581.42 = 928.52/x
3. Step 3: Cross multiply
   1,055.24x = 1,581.42 × 928.52
4. Step 4: Simplify right side
   1,055.24x = 1,468,380.10
5. Step 5: Solve for x
   x = 1,468,380.10/1,055.24
6. Step 6: Final answer
   x = 1,391.51