Finding the Fourth Proportional to 6,399.35, 8,831.40 and 3,747.61

Step by Step Solution

1. Step 1: Write the proportion equation
   6,399.35 : 8,831.40 = 3,747.61 : x
2. Step 2: Convert to fraction form
   6,399.35/8,831.40 = 3,747.61/x
3. Step 3: Cross multiply
   6,399.35x = 8,831.40 × 3,747.61
4. Step 4: Simplify right side
   6,399.35x = 33,096,580.06
5. Step 5: Solve for x
   x = 33,096,580.06/6,399.35
6. Step 6: Final answer
   x = 5,171.87