Finding the Fourth Proportional to 1,079.56, 1,489.27 and 959.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.56 : 1,489.27 = 959.89 : x
2. Step 2: Convert to fraction form
   1,079.56/1,489.27 = 959.89/x
3. Step 3: Cross multiply
   1,079.56x = 1,489.27 × 959.89
4. Step 4: Simplify right side
   1,079.56x = 1,429,535.38
5. Step 5: Solve for x
   x = 1,429,535.38/1,079.56
6. Step 6: Final answer
   x = 1,324.18