Which statement correctly defines a constant value for the amount of liters in a gallon as $3\mathrm{.}78541178?$

final long LITERS$\_$IN$\_$GALLON $=3\mathrm{.}7841178$;

const double LITERS$\_$IN$\_$GALLON $=3\mathrm{.}7841178$;

final double LITERS$\_$IN$\_$GALLON $=3\mathrm{.}7841178$;

constant final double LITERS$\_$IN$\_$GALLON $=3\mathrm{.}7841178$;