Finding the Fourth Proportional to 3,859.89, 5,321.46 and 3,017.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.89 : 5,321.46 = 3,017.28 : x
2. Step 2: Convert to fraction form
   3,859.89/5,321.46 = 3,017.28/x
3. Step 3: Cross multiply
   3,859.89x = 5,321.46 × 3,017.28
4. Step 4: Simplify right side
   3,859.89x = 16,056,334.83
5. Step 5: Solve for x
   x = 16,056,334.83/3,859.89
6. Step 6: Final answer
   x = 4,159.79