Use the Triangulation Device to point your way toward the second triangulation point. Once you have found it, report the location to Wind Trader Tuluman at Tuluman's Landing, just on the other side of the bridge from the Manaforge Ara island in the Netherstorm.
I've recalibrated the triangulation device with the information that you provided from the first point. You'll use it in exactly the same manner to discover the second.
All that I can tell you is that the second point is somewhere far to the west.
Once you've located it, speak with Wind Trader Tuluman; another of the nexus-prince's agents. He's posing as a weapon merchant at a small trading post next to the bridge, which leads to the island that Manaforge Ara is on.