Finding the Fourth Proportional to 5,166.72, 7,131.60 and 3,072.24

Step by Step Solution

1. Step 1: Write the proportion equation
   5,166.72 : 7,131.60 = 3,072.24 : x
2. Step 2: Convert to fraction form
   5,166.72/7,131.60 = 3,072.24/x
3. Step 3: Cross multiply
   5,166.72x = 7,131.60 × 3,072.24
4. Step 4: Simplify right side
   5,166.72x = 21,909,986.78
5. Step 5: Solve for x
   x = 21,909,986.78/5,166.72
6. Step 6: Final answer
   x = 4,240.60