\begin{align} \text{forces hotitzontals:} :&\cssId{Step1}{\Sigma F_{y}=0 }\\[3px] &\cssId{Step2}{\Sigma F_{y}=F_{guia}-F_{CD}sin\alpha}\\[3px] &\cssId{Step3}{F_{guia} = F_{CD}*sin\alpha }\\[3px] &\cssId{Step4}{F_{guia} =136,5*sin45= }\\[3px] &\cssId{Step5}{F_{guia}=96,52N}\\[3px] \end{align}