Finding the Fourth Proportional to 6,399.86, 8,831.85 and 3,747.32

Step by Step Solution

1. Step 1: Write the proportion equation
   6,399.86 : 8,831.85 = 3,747.32 : x
2. Step 2: Convert to fraction form
   6,399.86/8,831.85 = 3,747.32/x
3. Step 3: Cross multiply
   6,399.86x = 8,831.85 × 3,747.32
4. Step 4: Simplify right side
   6,399.86x = 33,095,723.98
5. Step 5: Solve for x
   x = 33,095,723.98/6,399.86
6. Step 6: Final answer
   x = 5,171.32