Finding the Fourth Proportional to 2,154.24, 3,229.76 and 854.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.24 : 3,229.76 = 854.72 : x
2. Step 2: Convert to fraction form
   2,154.24/3,229.76 = 854.72/x
3. Step 3: Cross multiply
   2,154.24x = 3,229.76 × 854.72
4. Step 4: Simplify right side
   2,154.24x = 2,760,540.47
5. Step 5: Solve for x
   x = 2,760,540.47/2,154.24
6. Step 6: Final answer
   x = 1,281.45