  Basing on the previously performed K-matrix analysis of experimental data, we
investigate, in the framework of the propagator matrix (D-matrix) technique,
the 1100-1900 MeV mass region, where overlapping resonances $f_0(1300)$,
$f_0(1500)$, $f_0(1530^{+90}_{-250})$, and $f_0(1780)$ are located. Necessary
elements of the D-matrix technique are developed. The D-matrix analysis
confirms previous K-matrix results: in the region 900-1900 MeV five
scalar/isoscalar states are located. Four of them are members of the two $q\bar
q$-nonets, while one state is an extra for the $q\bar q$ systematics, being a
good candidate for the lightest scalar glueball. The D-matrix analysis shows
that this extra state, a candidate for the lightest scalar glueball, is
dispersed, due to a mixing with $q\bar q$- states, over three resonances:
$f_0(1300)$, $f_0(1500)$, and $f_0(1530^{+90}_{-250})$. The broad resonance
$f_0(1530^+{90}_{-250})$ is a descendant of the lightest glueball carrying
about 50% of the gluonium component, the rest of the gluonium is shared between
$f_0(1300)$ and $f_0(1500)$.
