The modulus of $ z $ is:
$$ |z| = \frac{\sqrt{ 6560941565 }}{ 1000 }$$To find modulus of a complex number $ z = a + bi $ we use formula:
$$ |z| = \sqrt{a^2 + b^2} $$In this example we have $ a = \frac{ 30997 }{ 1000 } $ and $ b = \frac{ 37417 }{ 500 } $ so:
$$ \begin{aligned}|z| &= \sqrt{ \left(\frac{ 30997 }{ 1000 }\right)^2 + \left(\frac{ 37417 }{ 500 }\right)^2 } \\[1 em]|z| &= \sqrt{ \frac{ 960814009 }{ 1000000 } + \frac{ 1400031889 }{ 250000 } } \\[1 em]|z| &= \sqrt{ \frac{ 1312188313 }{ 200000 } } \\[1 em]|z| &= \frac{\sqrt{ 6560941565 }}{ 1000 } \\[1 em] \end{aligned} $$