First, calculate the average of the salaries from the last three years:
[tex]\frac{38,592+37,590+37,010}{3}=37,730.67[/tex]Next, calculate the percentage that Mrs. Brown will get, multiplying 1.8% times the amount of years that she worked:
[tex]28\times1.8=50.4[/tex]Finally, calculate what is 50.4% of the average income equal to:
[tex]\frac{50.4}{100}\times37,730.67=19,016.256[/tex]Therefore, the pension is equal to $19,016