Finding the Fourth Proportional to 1,659.52, 2,290.17 and 961.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.52 : 2,290.17 = 961.30 : x
2. Step 2: Convert to fraction form
   1,659.52/2,290.17 = 961.30/x
3. Step 3: Cross multiply
   1,659.52x = 2,290.17 × 961.30
4. Step 4: Simplify right side
   1,659.52x = 2,201,540.42
5. Step 5: Solve for x
   x = 2,201,540.42/1,659.52
6. Step 6: Final answer
   x = 1,326.61