Best way to solve for a implicit equation?

I'm trying to solve the following equation for M:

g = 1.27; ar = 44.11; (1/M)*((2/(g+1))*(1+(((g-1)/2)*M^2))^((g+1)/(2*(g-1)))) == ar

What is the best method? Thank you for the help!

Answer 1

[Star Strider]

The fzero function seems to be appropriate here:

g = 1.27; ar = 44.11; 
fcn = @(M) (1./M)*((2/(g+1)).*(1+(((g-1)/2)*M.^2)).^((g+1)/(2*(g-1)))) - ar;
M = fzero(fcn, 1)

M =
     4.3952