Finding the Fourth Proportional to 3,540.78, 5,311.16 and 1,076.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,540.78 : 5,311.16 = 1,076.31 : x
2. Step 2: Convert to fraction form
   3,540.78/5,311.16 = 1,076.31/x
3. Step 3: Cross multiply
   3,540.78x = 5,311.16 × 1,076.31
4. Step 4: Simplify right side
   3,540.78x = 5,716,449.24
5. Step 5: Solve for x
   x = 5,716,449.24/3,540.78
6. Step 6: Final answer
   x = 1,614.46