When the following reaction is balanced, what is the coefficient for Na3PO4\displaystyle \text{Na}_{{3}}\text{PO}_{{4}}?
Li2SO4+Na3PO4Na2SO4+Li3PO4\displaystyle \text{Li}_{{2}}\text{SO}_{{4}}+\text{Na}_{{3}}\text{PO}_{{4}}\rightarrow\text{Na}_{{2}}\text{SO}_{{4}}+\text{Li}_{{3}}\text{PO}_{{4}}