Finding the Fourth Proportional to 3,923.22, 5,426.06 and 3,857.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.22 : 5,426.06 = 3,857.61 : x
2. Step 2: Convert to fraction form
   3,923.22/5,426.06 = 3,857.61/x
3. Step 3: Cross multiply
   3,923.22x = 5,426.06 × 3,857.61
4. Step 4: Simplify right side
   3,923.22x = 20,931,604.03
5. Step 5: Solve for x
   x = 20,931,604.03/3,923.22
6. Step 6: Final answer
   x = 5,335.31