Solve the proportion. \[ \begin{array}{l} \frac{77}{7}=\frac{z}{1} \\ z=\square \end{array} \]

Step 1 ：\( \frac{77}{7}=\frac{z}{1} \)

Step 2 ：\( 77\div 7=z \)

Step 3 ：\( z=11 \)