Finding the Fourth Proportional to 5,174.46, 7,144.17 and 3,977.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,174.46 : 7,144.17 = 3,977.31 : x
2. Step 2: Convert to fraction form
   5,174.46/7,144.17 = 3,977.31/x
3. Step 3: Cross multiply
   5,174.46x = 7,144.17 × 3,977.31
4. Step 4: Simplify right side
   5,174.46x = 28,414,578.78
5. Step 5: Solve for x
   x = 28,414,578.78/5,174.46
6. Step 6: Final answer
   x = 5,491.31