Finding the Fourth Proportional to 5,222.24, 7,818.72 and 3,831.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,222.24 : 7,818.72 = 3,831.20 : x
2. Step 2: Convert to fraction form
   5,222.24/7,818.72 = 3,831.20/x
3. Step 3: Cross multiply
   5,222.24x = 7,818.72 × 3,831.20
4. Step 4: Simplify right side
   5,222.24x = 29,955,080.06
5. Step 5: Solve for x
   x = 29,955,080.06/5,222.24
6. Step 6: Final answer
   x = 5,736.06