I really can't find the proportional sign, , in my MS Word 2016? The Code 221D also doesn't work. Could you please help?
This isn't a proper question for Stack Overflow.
In Word, change the font to Symbol. As the proportional symbol is the Greek letter a, just type an a and it will be the alpha symbol. Change the font back to whatever you were using for the rest of your document.
Another way is Alt+945
Go to insert/symbol. a dialog box will open change the language to symbol and use the code 181.