Finding the Fourth Proportional to 3,971.59, 5,469.69 and 3,885.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971.59 : 5,469.69 = 3,885.49 : x
2. Step 2: Convert to fraction form
   3,971.59/5,469.69 = 3,885.49/x
3. Step 3: Cross multiply
   3,971.59x = 5,469.69 × 3,885.49
4. Step 4: Simplify right side
   3,971.59x = 21,252,447.21
5. Step 5: Solve for x
   x = 21,252,447.21/3,971.59
6. Step 6: Final answer
   x = 5,351.12