Final answer:
To find the value of X, set up a proportion and cross multiply.
Step-by-step explanation:
To find the value of X, we can set up a proportion using the given information:
10.4in/12in = X/12in
Next, cross multiply:
10.4in * 12in = X * 12in
Simplifying the equation:
X = (10.4in * 12in) / 12in
X = 10.4in