Applying cross multiplication, it is found that the value of x is given by:
[tex]x = \pm \sqrt{ab}[/tex]
The expression is given by:
[tex]\frac{a}{x} = \frac{x}{b}[/tex]
Applying cross multiplication, we have that the first step towards finding the solution for x is given as follows.
[tex]x^2 = ab[/tex]
Considering that when the square root is removed, we have to remember the plus/minus sign:
[tex]x = \pm \sqrt{ab}[/tex]
Which is the desired value of x.
More can be learned about cross multiplication at https://brainly.com/question/24372153