The third power point is the triangle center with triangle center function
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It is Kimberling center 
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Third Power Point
See also
Power Point, Second Power PointExplore with Wolfram|Alpha
References
Kimberling, C. "Encyclopedia of Triangle Centers: X(32)=3rd Power Point." http://faculty.evansville.edu/ck6/encyclopedia/ETC.html#X32.Referenced on Wolfram|Alpha
Third Power PointCite this as:
Weisstein, Eric W. "Third Power Point." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/ThirdPowerPoint.html