Finding the Fourth Proportional to 3,540.38, 5,311.54 and 1,075.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,540.38 : 5,311.54 = 1,075.28 : x
2. Step 2: Convert to fraction form
   3,540.38/5,311.54 = 1,075.28/x
3. Step 3: Cross multiply
   3,540.38x = 5,311.54 × 1,075.28
4. Step 4: Simplify right side
   3,540.38x = 5,711,392.73
5. Step 5: Solve for x
   x = 5,711,392.73/3,540.38
6. Step 6: Final answer
   x = 1,613.21