Komodo dragon height is 304,8 cm
100.000.000 cm/304,8 cm = scale factor of 328.083,989; Komodo dragon weighs 91 kg, meat density is 1kg/L --> 91.000 cm³
328.083,989^3*91.000 = 3.213.634.656.924.160.400.430,650 cm³ --> The density of steel is around 7,85 g/cm³
7,85*3.213.634.656.924.160.400.430,650 = 25.227.032.056.854.659.143.380,60 g or 2,5*10^19 kg (Class E)
PE = 25.227.032.056.854.659.143,38060*9.81*500.000 = 12.373.859.223.887.210.309.828.184.300 (Multi-Continent level, High 6-A)
This is just a exemple, you can probably get a better lizard as reference