Finding the Fourth Proportional to 6,399.62, 8,831.57 and 3,566.91

Step by Step Solution

1. Step 1: Write the proportion equation
   6,399.62 : 8,831.57 = 3,566.91 : x
2. Step 2: Convert to fraction form
   6,399.62/8,831.57 = 3,566.91/x
3. Step 3: Cross multiply
   6,399.62x = 8,831.57 × 3,566.91
4. Step 4: Simplify right side
   6,399.62x = 31,501,437.43
5. Step 5: Solve for x
   x = 31,501,437.43/6,399.62
6. Step 6: Final answer
   x = 4,922.39