Answer:
[tex]x=\sqrt{120}[/tex]
Step-by-step explanation:
Solving for two legs of triangle first.
Top Triangle
[tex]a^2+b^2=c^2[/tex]
[tex]15^2+b^2=19^2[/tex]
[tex]b^2=19^2-15^2[/tex]
[tex]b^2=361-225\\b=\sqrt{136}[/tex]
Bottom Triangle
[tex]a^2+b^2=c^2[/tex]
[tex]4^2+b^2=(\sqrt{136} )^2\\16+b^2=136\\b^2=120\\b=\sqrt{120}[/tex]
