Gardaí and emergency services were called to the house shortly after 8pm on Sunday night.
Mr Fortune was removed by ambulance to St James’s Hospital, where he was pronounced dead a short time later.
His son, David Fortune, also known as David O’Leary, with the same address was remanded in custody after appearing before Judge Mary Dorgan at Dublin District Court this afternoon.
He was charged with the murder of his father on 19 August 2018.
The accused was arrested on Sunday and after being cautioned by gardaí he made no reply, the court heard.
Judge Dorgan remanded him in custody to appear at Cloverhill District Court on 28th August.