A 52-year-old man from Delhi presents with a 6-month history of a painless swelling in the right groin that increases on standing and reduces on lying down. On examination, the swelling is below and medial to the pubic tubercle. The swelling is soft, compressible, and impulse is transmitted through it on coughing. Ultrasound confirms a hernia sac containing bowel loops. What is the most appropriate next step in management?