1. **State the problem:** We need to find the sum of 4578 and 227, i.e., solve the equation $$4578 + 227 = ?$$. 2. **Formula used:** Addition of two numbers is performed by adding their digits starting from the rightmost digit (units place) and carrying over if the sum exceeds 9. 3. **Step-by-step addition:** - Add the units digits: $8 + 7 = 15$. Write down 5 and carry over 1. - Add the tens digits plus carry: $7 + 2 + 1 = 10$. Write down 0 and carry over 1. - Add the hundreds digits plus carry: $5 + 2 + 1 = 8$. Write down 8. - Add the thousands digits: $4 + 0 = 4$. Write down 4. 4. **Combine the digits:** The sum is $4805$. 5. **Final answer:** $$4578 + 227 = 4805$$