By default, if you enable the Show "Other" option, the answer will appear last in your list of answer options:
However, if it is preferrable for Other to appear elsewhere in your list, can accomplish this with some JavaScript.
Assuming your answer options are using answer codes “SQ001”, “SQ002”, … you can use the following code snippet to place the “other” option before the 4th answer option (SQ004 - “Decline” -- in the example above).
Copy the following code and paste it into the Script panel in your question details (edit line #5 and replace SQ004 with your own relevant answer code):
$(document).ready(function() {
/* Adjust these settings */
var move_element="other";
var place_before="SQ004";
/* Please do NOT change the lines below */
var place_before="javatbd{SGQ}"+place_before;
var move_element="javatbd{SGQ}"+move_element;
$("#"+move_element).insertBefore("#"+place_before);
});
Save your question, and preview it to confirm the Other option is in the desired location: