title: Proportion of Data Less Than Given Value in R
body: <p>In R, how can you find the smallest value in a vector such that the proportion of data less than or equal to it is greater than a certain number?</p>
  
  <p>Note, I am not looking to use the <code>quantile</code> function, since (I believe) this doesn't give the smallest values.</p>
  
  <p>Thanks,</p>
  
  <p>Jack</p>