Finding the Fourth Proportional to 2,540.55, 3,810.91 and 874.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.55 : 3,810.91 = 874.66 : x
2. Step 2: Convert to fraction form
   2,540.55/3,810.91 = 874.66/x
3. Step 3: Cross multiply
   2,540.55x = 3,810.91 × 874.66
4. Step 4: Simplify right side
   2,540.55x = 3,333,250.54
5. Step 5: Solve for x
   x = 3,333,250.54/2,540.55
6. Step 6: Final answer
   x = 1,312.02