Finding the Fourth Proportional to 1,131.32, 1,561.20 and 659.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.32 : 1,561.20 = 659.30 : x
2. Step 2: Convert to fraction form
   1,131.32/1,561.20 = 659.30/x
3. Step 3: Cross multiply
   1,131.32x = 1,561.20 × 659.30
4. Step 4: Simplify right side
   1,131.32x = 1,029,299.16
5. Step 5: Solve for x
   x = 1,029,299.16/1,131.32
6. Step 6: Final answer
   x = 909.82