It all depends on the specific project en the method you are using. Further information can be found in this article. Thus 186 sample size arrived at should be corrected adjusted for finite population.
The resulting value of n equals the sample size to be used.
If you have a small to moderate population and know all of the key values you should use the standard formula. When you want to identify the sample size for a larger population one can use the following formula. N is population size. N NX X N 1 where X Z a22 p 1-p MOE 2 and Z a2 is the critical value of the Normal distribution at a2 eg.