Molar mass:
iron = 55.8 g/mol
Sulfur = 32.0 g/mol
Number of moles
53.70 / 55.8 = 0.96 moles
46.30 / 32.0 = 1.44 moles
Using the values determines the entire lower proportion in moles of the elements, just divide by the smaller one
Fe = 0.96 / 0.96
Fe = 1 mole
S = 1.4 / 0.96
S = 1.5 moles
multiply them by 2.
iron : 2 * 1 = 2
Sulfur : 1.5 * 2 = 3
the empirical formula is Fe₂S₃
hope this helps!