PA: 4.68mol
DEG: 7.01mol
Glycerol: 1 mol
assume
PA: X mol, 148g/mol, F=2
DEG: Ymol, 106g/mol, F=2
Glycerol: 1mol, 92g/mol, F=3
given OHV=300
EW=56100/300=187
Y(yield of poly ester ol)=(3-2)*187/(1-2/2.3)=1435
so (146X+106Y+92Z-18X=1435=>128X+106Y=1343
2Y+3-2X=Y/EW=7.6738
solve this two variable equations, you can get
X=4.68, Y=7.02
in Practical, you need charge more DEG(Y).