Finding the Fourth Proportional to 5,400.72, 8,101.52 and 3,949.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,400.72 : 8,101.52 = 3,949.07 : x
2. Step 2: Convert to fraction form
   5,400.72/8,101.52 = 3,949.07/x
3. Step 3: Cross multiply
   5,400.72x = 8,101.52 × 3,949.07
4. Step 4: Simplify right side
   5,400.72x = 31,993,459.21
5. Step 5: Solve for x
   x = 31,993,459.21/5,400.72
6. Step 6: Final answer
   x = 5,923.92