Finding the Fourth Proportional to 2,440.72, 3,659.88 and 880.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.72 : 3,659.88 = 880.64 : x
2. Step 2: Convert to fraction form
   2,440.72/3,659.88 = 880.64/x
3. Step 3: Cross multiply
   2,440.72x = 3,659.88 × 880.64
4. Step 4: Simplify right side
   2,440.72x = 3,223,036.72
5. Step 5: Solve for x
   x = 3,223,036.72/2,440.72
6. Step 6: Final answer
   x = 1,320.53