Of course, as everyone knows, the answer was 42, but what was the question?
The listed coordinates are not the actual coordinates but are within 5km. In fact the actual coordinates were mislaid after having been calculated by the same computer that searched for the Ultimate Question. With infinite improbability, they were eventually revealed when they were extracted from the computer via a cacher's subconscious mind while he was pulling Scrabble® letters at random out of a sack.
When placed on the Scrabble board the letters read:
Click here to check your answer (Note that depending on how you figure this out, sometimes rounding can mean you are out by one in the last digit - so if you are feeling confident try adjusting the last digit by 1 up or down if it doesn't work the first time)