Finding the Fourth Proportional to 3,996.82, 5,515.61 and 2,228.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996.82 : 5,515.61 = 2,228.39 : x
2. Step 2: Convert to fraction form
   3,996.82/5,515.61 = 2,228.39/x
3. Step 3: Cross multiply
   3,996.82x = 5,515.61 × 2,228.39
4. Step 4: Simplify right side
   3,996.82x = 12,290,930.17
5. Step 5: Solve for x
   x = 12,290,930.17/3,996.82
6. Step 6: Final answer
   x = 3,075.18