dsolve second order differential equation

I am working on second order diferantial question,

y"=0.0008742

y(0)=0 , y(585.8)=150,

My code is below

syms y(x)

eqn = diff(y,x,2) == 0.00087422358746158224444900076826769;

Dy = diff(y,x);

cond = [y(0)==0, y(585.8)==150];

ySol(x) = dsolve(eqn,cond)

Dy(585.8)

I want to find Dy at 585.8, but i cant find solution

it gives, D(y)(2929/5) but it is useless

how can i find Dy(585.8),

Answer 1

[Torsten]

dySol=diff(ySol,x);

dySol(585.8)

[esat gulhan]

Excellent, thank you