Is Fortran dead? Of course not. Is it still used today? Yes, and probably you are using some library written in Fortran in your code.
I have personally never written Fortran code, but I saw other people’s code, and Fortran is still one of the best options to write optimized code for scientific purposes.
You have probably heard of NumPy and SciPy for scientific computation in Python, and both are written (also) in Fortran, so every time you use some complex math computation libraries in Python you use some Fortran code.
The original Fortran was developed in 1957, but the latest standard is from 2008, so there has been quite a lot of development in it. The biggest problem is that Fortran is usually used by non-developers programmers, but instead by the scientific community, which doesn’t really know the best practice of maintainability, reusability and documentation of the code, but if a programmer knows how to write Fortran 2008 it’s quite a clear language for scientific purposes, and it’s also extremely optimized, so you gain a lot of performance improvements compared to other programming languages.
Remember that the world is not only using Python, Node or Go, in the real world a lot of other programming languages are used, and even if you consider them “dead” because are not every day in the news, they are alive and performing their tasks better than most of the other ones.