Finding the Fourth Proportional to 2,854.78, 4,280.59 and 1,005.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,854.78 : 4,280.59 = 1,005.73 : x
2. Step 2: Convert to fraction form
   2,854.78/4,280.59 = 1,005.73/x
3. Step 3: Cross multiply
   2,854.78x = 4,280.59 × 1,005.73
4. Step 4: Simplify right side
   2,854.78x = 4,305,117.78
5. Step 5: Solve for x
   x = 4,305,117.78/2,854.78
6. Step 6: Final answer
   x = 1,508.04