How to make Three figures in one horizontal Line in Latex?

Your code sniped :

• It seems that your images are to wide that can be fit in one line. As a cure define their width as fraction of the text width (since all have the same width, you can use keys Gin (See MWE below)
• In code you use subfigure[]{...}, which are defined by deprecated package subfigure.
• Since your in code fragment aren't present subcaptions, there is no reason to use subfigure or packages by which it is replaced (subfig or even better is to use subcaptions).
• Please, in future questions always provide MWE (Minimal Working Example, a small but complete document, which compilation reproduce your problem).

An example of MWE can serve:

documentclass[twocolumn]{article}
usepackage{graphicx}

%---------------- show page layout. don't use in a real document!
usepackage{showframe}
renewcommandShowFrameLinethickness{0.15pt}
renewcommand*ShowFrameColor{color{red}}
%---------------------------------------------------------------%

begin{document}
    begin{figure*}
centering
setkeys{Gin}{width=0.32linewidth}
includegraphics{example-image-duck}%{fig4a.png}}  % we haven't your images ...
hfill
includegraphics{example-image-duck}%{fig4b.png}}
hfill
includegraphics{example-image-duck}%{fig4c.png}}
    caption{desired caption}
label{fig_4}
    end{figure*}
end{document}

(red lines indicate text borders in your document)