Finding the Fourth Proportional to 5,540.40, 8,301.33 and 3,978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,540.40 : 8,301.33 = 3,978.03 : x
2. Step 2: Convert to fraction form
   5,540.40/8,301.33 = 3,978.03/x
3. Step 3: Cross multiply
   5,540.40x = 8,301.33 × 3,978.03
4. Step 4: Simplify right side
   5,540.40x = 33,022,939.78
5. Step 5: Solve for x
   x = 33,022,939.78/5,540.40
6. Step 6: Final answer
   x = 5,960.39