Finding the Fourth Proportional to 3,960.80, 5,936.72 and 3,040.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,960.80 : 5,936.72 = 3,040.23 : x
2. Step 2: Convert to fraction form
   3,960.80/5,936.72 = 3,040.23/x
3. Step 3: Cross multiply
   3,960.80x = 5,936.72 × 3,040.23
4. Step 4: Simplify right side
   3,960.80x = 18,048,979.04
5. Step 5: Solve for x
   x = 18,048,979.04/3,960.80
6. Step 6: Final answer
   x = 4,556.91