Cracking a hash when you know the result? If I know that the algorithm used is SHA1 constructed as salt+key, and I have the result, is it possible to find the salt?

Example:

sha1(saltExamplealturkovic) =&gt; 4e6a306ff65e252571f36972949f45e513b79ba7


In this example, I know that the input value is alturkovic, the result is 4e6a306ff65e252571f36972949f45e513b79ba7, how it is constructed and that SHA1 is used as the hashing algorithm. I would like to find out what salt was used (with some common sense limits of course, such as length).

I tried using hashcat but I can't figure out if this can even be done using such a tool...
TL;DR: Salts are too long to try and brute force them.

In theory
You can create a mask attack using hashcat, specifically a hybrid attack.
Let's assume you know that the salt used is (only) 4 numbers.
-a 7 ?d?d?d?d myKnownKey.txt

myKnownKey.txt contains the key alturkovic.
This setup would then try out these combinations:

0000alturkovic
0001alturkovic
0002alturkovic
$\ldots$
9999alturkovic

This is one example of how to create hybrid attacks using hashcat.

In practice
In practice salts are (as SEJPM commented) of course not only just 4 digits long but they are very long random alphanumerical characters and thus renders any brute force attacks impractical.