Finding the Fourth Proportional to 3,995.50, 5,513.72 and 2,227.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,995.50 : 5,513.72 = 2,227.20 : x
2. Step 2: Convert to fraction form
   3,995.50/5,513.72 = 2,227.20/x
3. Step 3: Cross multiply
   3,995.50x = 5,513.72 × 2,227.20
4. Step 4: Simplify right side
   3,995.50x = 12,280,157.18
5. Step 5: Solve for x
   x = 12,280,157.18/3,995.50
6. Step 6: Final answer
   x = 3,073.50