1. **State the problem:** Find the third quartile (Q3) of a dataset with 36 values. 2. **Formula and explanation:** The third quartile is the value that separates the top 25% of the data from the rest. Its position in an ordered dataset is given by: $$\text{Position of } Q3 = \frac{3}{4} \times n$$ where $n$ is the number of data points. 3. **Calculate the position:** $$\frac{3}{4} \times 36 = 27$$ So, the third quartile is the 27th value in the ordered dataset. 4. **Find the value at the 27th position:** According to the problem, the 27th value is 74. 5. **Final answer:** $$Q3 = 74$$