He's not necessarily happy at all. He just realized that Beatty wanted to die, and granted what he wanted. I think it made Montag more sad than anything, because Montag was doing what Beatty couldn't ( rebelling against society )
William Rabb Beatty died in 1905.
Hetty Burlingame Beatty died in 1971.
Ed Beatty died on 2008-06-07.
Charles Eugene Beatty died in 1998.
Desmond Beatty died on 1969-10-06.
William H. Beatty died in 1914.
William Louis Beatty died in 2001.
Alfred Chester Beatty died in 1968.
Samuel Beatty - mathematician - died in 1970.
James Helmick Beatty died in 1927.
Because beatty disliked the society they lived in
David Earl Beatty died on March 11, 1936.