Please install this plugin to add easy shortcode columns layout which will fit in multiple viewports:
eVision Themes Responsive Columns Layout Shortcodes

Two Column
[bscolumns class=”one_half”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur [/bscolumns][bscolumns class=”one_half_last”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur [/bscolumns]

Three Column
[bscolumns class=”one_third”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur[/bscolumns][bscolumns class=”one_third”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur[/bscolumns][bscolumns class=”one_third_last”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur[/bscolumns]

Four Column
[bscolumns class=”one_fourth”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur[/bscolumns][bscolumns class=”one_fourth”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur[/bscolumns][bscolumns class=”one_fourth”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur[/bscolumns][bscolumns class=”one_fourth_last”]Lorem ipsum ex vix illud nonummy, novum tation et his. At vix scriptaset patrioque scribentur[/bscolumns]