SOMEONE PLEASE ANSWER THAT IS LITERALLY THE LAST QUESTION THAT'S THE LAST THING I NEED TO TURN IN TO MY TEACHER THEN THAT'S ALL just help me with this

Answer: 36
Step-by-step explanation:
12*108=1296
Take the square root: 36
Inserting the answer, we see that all of the sequence is the previous number multiplied by 3.
e.g.
4*3=12
12*3=36
36*3=108
108*3=324
I hope this helps!