Remember that $\displaystyle{4.32}={4.320}\usepackage{cmbright}\Huge\$ . Now compare the digits of $\displaystyle{4.320}\usepackage{cmbright}\Huge\$ and $\displaystyle{4.324}\usepackage{cmbright}\Huge\$ . The digits in the ones, tenths, and hundredths place are the same. Comparing the digits in the thousandths place, $\displaystyle{0}<{4}\usepackage{cmbright}\Huge\$ . Therefore, $\displaystyle{4.320}<{4.324}\usepackage{cmbright}\Huge\$ .