Shankar recorded a tournament total of 15-under 273 to lift his fourth professional title. Amardip Sinh Malik of Greater Noida finished as the runner-up.
Shankar (67-69-67-70), the overnight joint leader along with Chikkarangappa, came up with seven birdies against two bogeys and a triple-bogey in the final round to end a two-year title drought.
Das began the day with a birdie-bogey on the first two holes. He then built a three-shot lead at the top by sinking a birdie from 20 feet on the fourth even as Chikka dropped bogeys on the third and fourth.
Amardip Sinh Malik (68-69-69-69) was a threat to Shankar on the front-nine as he came within one stroke of the eventual champion.
The wiry 28-year-old finished second at 13-under-275.
Chikkarangappa S (66-69-68-74) of Bangalore, the overnight joint leader along with Shankar, fired a 74 in round four to end up third at 11-under 277.
Panchkula's Angad Cheema secured tied fourth position along with Chandigarh golfer Sujjan Singh and the Delhi duo of Manav Jaini and Shamim Khan at nine-under 279.
