Analyze the provided figure and text to determine the accuracy of the given statements regarding South African demographics and migration.

Let's evaluate each statement based on the provided figure and text:

• Statement 1: Gauteng has the largest population in South Africa. From the bar chart, Gauteng has a population of $16\,104\,933$, which is the highest among all listed provinces. This statement is correct.

• Statement 2: The Northern Cape has the smallest population in South Africa. From the bar chart, the Northern Cape has a population of $1\,379\,183$, which is the lowest among all listed provinces. This statement is correct.

• Statement 3: The Eastern Cape is one of the three metropolitan areas that attract migrants. The text states that the three metropolitan areas attracting migrants are "Gauteng, KwaZulu-Natal (KZN) and the Western Cape." The Eastern Cape is not listed as one of these three. This statement is incorrect.

• Statement 4: The Western Cape is one of the three metropolitan areas that attract migrants. The text explicitly lists "Gauteng, KwaZulu-Natal (KZN) and the Western Cape" as the three metropolitan areas attracting migrants. This statement is correct.

Therefore, statements 1, 2, and 4 are correct.