the distance from Proxima centauri to earth is 4.2 light years or in km that is

1 light year = 9.4605284 × 10^12 kilometers

d = 4.2 light years = 39.72*10^12 km

the speed of Apollo 10 was: v1 = 39,896 km/h

the speed of the proxima centauri spaceship is 50 times faster that Apollo 10:

v2 = 50*v1

since speed = distance/time => time = distance/speed

let t = time that proxima centauri spaceship need to get to the Earth

t = d/(50*v1)

t = 39.72*10^12/(50*39,896) h

t = 19911770. 604 h

lets convert the hours into years

1 year = 365*24 = 8760 h

t = 19911770. 604/8760 years

t = 2,273.03 years

It would take 2,273.03 years for the proxima centauri to get to the Earth.