Finding the Fourth Proportional to 5,760.80, 7,947.52 and 3,871.52

Step by Step Solution

1. Step 1: Write the proportion equation
   5,760.80 : 7,947.52 = 3,871.52 : x
2. Step 2: Convert to fraction form
   5,760.80/7,947.52 = 3,871.52/x
3. Step 3: Cross multiply
   5,760.80x = 7,947.52 × 3,871.52
4. Step 4: Simplify right side
   5,760.80x = 30,768,982.63
5. Step 5: Solve for x
   x = 30,768,982.63/5,760.80
6. Step 6: Final answer
   x = 5,341.10