Finding the Fourth Proportional to 3,917.49, 5,870.71 and 2,163.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,917.49 : 5,870.71 = 2,163.28 : x
2. Step 2: Convert to fraction form
   3,917.49/5,870.71 = 2,163.28/x
3. Step 3: Cross multiply
   3,917.49x = 5,870.71 × 2,163.28
4. Step 4: Simplify right side
   3,917.49x = 12,700,016.76
5. Step 5: Solve for x
   x = 12,700,016.76/3,917.49
6. Step 6: Final answer
   x = 3,241.88