Using proportions, it is found that the equivalent of this American currency at that time was of 210.91 dollars.
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
Researching on the internet, in October 2020, the rate was that each euro was worth 1.1717 dollars, hence the equivalent of this American currency at that time was of:
E = 180 x 1.1717 = 210.91 dollars.
More can be learned about proportions at https://brainly.com/question/24372153
#SPJ1