His sister Gena, 21, tells MTV News that Fortunato left his Connecticut workplace early to drive himself to the hospital, but swerved and hit a fence en route.
When the paramedics arrived at the scene they transported him to the hospital for treatment.
An autopsy has yet to be released, but Mike's younger sister, Gena, confirmed the death to MTV News Monday night.
A spokesperson for the Farmington, Connecticut, chief medical examiner's office told MTV News that Fortunato died at Hartford Hospital as a result of a pulmonary embolism due to deep vein thrombosis.
"We are deeply saddened by the loss of Michael Fortunato," read a statement from an MTV spokesperson.
Unfortunately, he’s taken by a pretty brunette named Sarah Barlett who he enjoys travelling the world with.
One month after their episode aired, Michael passed away from a pulmonary embolism at the age of 26.
"The last thing we said to each other was that we loved each other," Ashley tearfully recounted to Max during a recent catch-up special, where she revealed that she was staying in a sober-living facility after struggling with addiction.
"We had a great relationship," Ashley's sister Jessica Ross told MTV News.
"I know she knows how much I loved her and she loved me, and I am so sad that she’s gone.