Finding the Fourth Proportional to 1,131.59, 1,561.50 and 659.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.59 : 1,561.50 = 659.55 : x
2. Step 2: Convert to fraction form
   1,131.59/1,561.50 = 659.55/x
3. Step 3: Cross multiply
   1,131.59x = 1,561.50 × 659.55
4. Step 4: Simplify right side
   1,131.59x = 1,029,887.33
5. Step 5: Solve for x
   x = 1,029,887.33/1,131.59
6. Step 6: Final answer
   x = 910.13