Finding the Fourth Proportional to 2,152.56, 3,229.38 and 854.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.56 : 3,229.38 = 854.40 : x
2. Step 2: Convert to fraction form
   2,152.56/3,229.38 = 854.40/x
3. Step 3: Cross multiply
   2,152.56x = 3,229.38 × 854.40
4. Step 4: Simplify right side
   2,152.56x = 2,759,182.27
5. Step 5: Solve for x
   x = 2,759,182.27/2,152.56
6. Step 6: Final answer
   x = 1,281.81