Finding the Fourth Proportional to 3,996.56, 5,515.20 and 2,228.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996.56 : 5,515.20 = 2,228.06 : x
2. Step 2: Convert to fraction form
   3,996.56/5,515.20 = 2,228.06/x
3. Step 3: Cross multiply
   3,996.56x = 5,515.20 × 2,228.06
4. Step 4: Simplify right side
   3,996.56x = 12,288,196.51
5. Step 5: Solve for x
   x = 12,288,196.51/3,996.56
6. Step 6: Final answer
   x = 3,074.69