Finding the Fourth Proportional to 1,131.27, 1,561.10 and 659.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.27 : 1,561.10 = 659.18 : x
2. Step 2: Convert to fraction form
   1,131.27/1,561.10 = 659.18/x
3. Step 3: Cross multiply
   1,131.27x = 1,561.10 × 659.18
4. Step 4: Simplify right side
   1,131.27x = 1,029,045.90
5. Step 5: Solve for x
   x = 1,029,045.90/1,131.27
6. Step 6: Final answer
   x = 909.64