Finding the Fourth Proportional to 1,659.52, 2,290.20 and 960.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.52 : 2,290.20 = 960.90 : x
2. Step 2: Convert to fraction form
   1,659.52/2,290.20 = 960.90/x
3. Step 3: Cross multiply
   1,659.52x = 2,290.20 × 960.90
4. Step 4: Simplify right side
   1,659.52x = 2,200,653.18
5. Step 5: Solve for x
   x = 2,200,653.18/1,659.52
6. Step 6: Final answer
   x = 1,326.08