\documentclass{article}

\usepackage{commath}

% [LaTeX Stack Exchange answer](https://tex.stackexchange.com/a/27533)
% by [kahen](https://tex.stackexchange.com/users/1495/kahen),
% © 2011 and licensed under [CC BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/).
\DeclareFontEncoding{FML}{}{}
\DeclareFontSubstitution{FML}{futm}{m}{it}
\DeclareSymbolFont{fourier}{FML}{futm}{m}{it}
\DeclareMathSymbol{\partialup}{\mathord}{fourier}{130}
\renewcommand*{\partial}{\partialup}

\pagestyle{empty}

\begin{document}

\begin{equation*}
  \dpd{f}{x} = x^2
\end{equation*}

\end{document}
