Getting R to work with Fedora 26

I just installed Fedora 26 on my laptop, and R now fails to load.  The
error message is missing libgfortran.so.3.  Does anyone have a fix for
this?  FC 26 comes with R-3.4.1 as an RPM, but it throws the error, as
does trying to compile R-3.4.1 from source.

Looking at my Fedora 26 system:

[spot at localhost ~]$ rpm -q R-core
R-core-3.4.1-1.fc26.x86_64

[spot at localhost ~]$ rpm -q R-core --requires |grep libgfortran
libgfortran.so.4()(64bit)
libgfortran.so.4(GFORTRAN_7)(64bit)

I'm not sure how you ended up with an R package that depends on
libgfortran.so.3, unless you have one for an older Fedora. In Fedora 26,
libgfortran.so.4 is provided by libgfortran.

~tom