Finding the Fourth Proportional to 5,167.20, 7,131.72 and 3,072.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,167.20 : 7,131.72 = 3,072.48 : x
2. Step 2: Convert to fraction form
   5,167.20/7,131.72 = 3,072.48/x
3. Step 3: Cross multiply
   5,167.20x = 7,131.72 × 3,072.48
4. Step 4: Simplify right side
   5,167.20x = 21,912,067.07
5. Step 5: Solve for x
   x = 21,912,067.07/5,167.20
6. Step 6: Final answer
   x = 4,240.61