This problem can be solved using the concept of weighted averages or alligation. The average salary of all employees is the weighted average of the salaries of male and female employees. By setting up the equation (Total Salary) / (Total Employees) = Average Salary, and knowing the average salaries of males and females, we can determine the proportion of males and females. The given values indicate that the average salary of males (5200) is closer to the overall average (5000) than the average salary of females (4200), implying a higher proportion of males.