The terms that are called means are 2 and 36
Solution:
A proportion is simply a statement that two ratios are equal
Proportion is written as:

In ratios, we can write as,
a : b = c : d
To find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

Here, a and d are extremes
b and c are means
In the given proportion,


Here, 12 and 6 are extremes
2 and 36 are means