Finding the Fourth Proportional to 1,025.96, 1,532.39 and 928.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.96 : 1,532.39 = 928.31 : x
2. Step 2: Convert to fraction form
   1,025.96/1,532.39 = 928.31/x
3. Step 3: Cross multiply
   1,025.96x = 1,532.39 × 928.31
4. Step 4: Simplify right side
   1,025.96x = 1,422,521.82
5. Step 5: Solve for x
   x = 1,422,521.82/1,025.96
6. Step 6: Final answer
   x = 1,386.53