Finding the Fourth Proportional to 1,659.48, 2,290.86 and 960.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.48 : 2,290.86 = 960.72 : x
2. Step 2: Convert to fraction form
   1,659.48/2,290.86 = 960.72/x
3. Step 3: Cross multiply
   1,659.48x = 2,290.86 × 960.72
4. Step 4: Simplify right side
   1,659.48x = 2,200,875.02
5. Step 5: Solve for x
   x = 2,200,875.02/1,659.48
6. Step 6: Final answer
   x = 1,326.24