Finding the Fourth Proportional to 3,906.21, 5,387.27 and 3,517.41

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.21 : 5,387.27 = 3,517.41 : x
2. Step 2: Convert to fraction form
   3,906.21/5,387.27 = 3,517.41/x
3. Step 3: Cross multiply
   3,906.21x = 5,387.27 × 3,517.41
4. Step 4: Simplify right side
   3,906.21x = 18,949,219.78
5. Step 5: Solve for x
   x = 18,949,219.78/3,906.21
6. Step 6: Final answer
   x = 4,851.05