Finding the Fourth Proportional to 1,131.10, 1,560.94 and 659.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.10 : 1,560.94 = 659.10 : x
2. Step 2: Convert to fraction form
   1,131.10/1,560.94 = 659.10/x
3. Step 3: Cross multiply
   1,131.10x = 1,560.94 × 659.10
4. Step 4: Simplify right side
   1,131.10x = 1,028,819.76
5. Step 5: Solve for x
   x = 1,028,819.76/1,131.10
6. Step 6: Final answer
   x = 909.58