Finding the Fourth Proportional to 1,025.57, 1,535.97 and 659.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.57 : 1,535.97 = 659.27 : x
2. Step 2: Convert to fraction form
   1,025.57/1,535.97 = 659.27/x
3. Step 3: Cross multiply
   1,025.57x = 1,535.97 × 659.27
4. Step 4: Simplify right side
   1,025.57x = 1,012,618.94
5. Step 5: Solve for x
   x = 1,012,618.94/1,025.57
6. Step 6: Final answer
   x = 987.37