Two are in proximity (including the one most like our Sun), the red dwarf is .14 lightyears further from Earth, and a bit more than that from the binary.
http://www.solstation.com/stars/alp-cent3.htm
[snip] Proxima Centauri (or Alpha Centauri C) is only 4.22 light-years (ly) away (14:29:42.95-62:40:46.14, ICRS 2000.0) but is too dim to be seen with the naked eye. The two bright stars, Alpha Centauri A and B (14:39:36.5-62:50:02.3 and 14:39:35.1-60:50:13.8, ICRS 2000.0), are a little farther away at about 4.36 ly. They form a close binary that is separated “on average” by only about 24 times the Earth-Sun distance — an average orbital distnace or semi-major axis of 23.7 astronomical units (AUs) — which is only slightly greater than the distance between Uranus and the Sun (”Sol”). [/snip]
Whoops, sorry, closer to Earth, and more than that distant from the binary.