Finding the Fourth Proportional to 5,831.64, 8,049.42 and 3,969.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,831.64 : 8,049.42 = 3,969.72 : x
2. Step 2: Convert to fraction form
   5,831.64/8,049.42 = 3,969.72/x
3. Step 3: Cross multiply
   5,831.64x = 8,049.42 × 3,969.72
4. Step 4: Simplify right side
   5,831.64x = 31,953,943.56
5. Step 5: Solve for x
   x = 31,953,943.56/5,831.64
6. Step 6: Final answer
   x = 5,479.41