Students in a Science Fair by Grade

A school is organizing a science fair. The number of students from three different grades participating is in the ratio 2:3:5. If there are a total of 100 students participating in the fair, how many students from the third grade are participating?

Let the number of students from the first, second, and third grades be represented as $2x$, $3x$, and $5x$ respectively. Using this ratio, find the value of $x$ to determine the number of students from the third grade.