Finding the Fourth Proportional to 1,008.52, 1,391.94 and 659.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.52 : 1,391.94 = 659.20 : x
2. Step 2: Convert to fraction form
   1,008.52/1,391.94 = 659.20/x
3. Step 3: Cross multiply
   1,008.52x = 1,391.94 × 659.20
4. Step 4: Simplify right side
   1,008.52x = 917,566.85
5. Step 5: Solve for x
   x = 917,566.85/1,008.52
6. Step 6: Final answer
   x = 909.82