Step 1: Apply current division principles.
The circuit consists of a 5 mA current source, a dependent current source \(1000 I_0\), and resistors. Use Kirchhoff's Current Law (KCL) to analyze the node with \(I_x\).
Step 2: Define the known currents.
Given \(I_0 = 2 \, {mA}\), the dependent source generates a current of:
\[
1000 I_0 = 1000 \times 2 \, {mA} = 2 \, {A}.
\]
Step 3: Determine \(I_x\).
The current \(I_x\) flows through the 1 k\(\Omega\) resistor. Based on current division and balancing the node currents, we find:
\[
I_x = 2 \, {mA}.
\]
Final Answer:
\[\boxed{{2}}\]