  A new mechanism for Topological Hall Effect (THE) was recently proposed for
the spiral magnet YMn$_{6}$Sn$_{6},$ which requires transverse conical spiral
(TCS) magnetism, induced by external magnetic field, combined with thermally
excite helical spiral magnons. In principle, this mechanism should be
applicable to other itinerant spiral magnets as well. In this paper, we show
that another metamagnetic compound, Fe$_{3}$Ga$_{4}$, where THE was observed
experimentally before, in one of its phases satisfies this condition, and the
proposed theory of thermal-fluctuation driven THE is quantitatively consistent
with the experiment. This finding suggests that this mechanism is indeed rather
universal, and the effect may have been observed in other compounds before, but
overlooked.
