Finding the Fourth Proportional to 2,540.52, 3,809.69 and 874.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.52 : 3,809.69 = 874.82 : x
2. Step 2: Convert to fraction form
   2,540.52/3,809.69 = 874.82/x
3. Step 3: Cross multiply
   2,540.52x = 3,809.69 × 874.82
4. Step 4: Simplify right side
   2,540.52x = 3,332,769.58
5. Step 5: Solve for x
   x = 3,332,769.58/2,540.52
6. Step 6: Final answer
   x = 1,311.85