Step 1. Draw a line MN=5.8cm.
Step 2. Draw an arc of radius 4.5cm by taking M as center.
Step 3. Draw an arc of radius 5cm by taking N as center and intersect both the arcs at point A.
Step 4. Join AM and AN.
Step 5. Draw ∠DAN=∠ANM at point A.
Step 6. Produce DA to point C.
Therefore, the required parallel line is CAD.