You can't "bypass cycling"...
To recap your situation...
You soaked media in a mature tank for 3 days... Was water being pushed through the media or was it simply sitting idle in the tank? If it was placed in the fitler or used as a prefilter with water being pushed/pulled through it then there is a pretty good chance this 'seeded' the media with bacteria... but if you just tossed it in then there is not a very good chance you got any quantifiable amount of bacteria seeded in/on it...
Transferring 'old tank water' from the old tank is not a sufficient way to transfer bacteria. While bacteria can become dislodged and 'swim' in open water, this is not common enough for using old tank water to have any measuable value in cycling a new tank...
You added liquid ammonia to this tank 3 weeks ago right? You added a few Goldfish to this tank about 3 weeks ago right? You've been feeding these fish right?
If any or all of that is true than you have an ammonia source...
Thus if the tank is cycled and you are ready for fish, then you will have a measuable nitrate reading... if there is no measurable nitrates, and no measurable nitrites... chances are your fish are suffering in ammonia polluted water...