What will come in place of the question mark (?) in the following number series?
Successive multiples of 11.15 are added.
55 $$+ (11.15 \times 1)$$ = 66.15
66.15 $$+ (11.15 \times 2)$$ = 88.45
88.45 $$+ (11.15 \times 3)$$ = 121.9
121.9 $$+ (11.15 \times 4)$$ = 166.5
166.5 $$+ (11.15 \times 5)$$ = 222.25
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