2.109
2.6
2.1062
2.16
Look at the tenths place first. All of the numbers have 1 besides 2.6 in the tenths place, so we know that 2.6 will go last because it is the greatest.
Now look at the hundredths place. 2.109 and 2.1062 both have 0 while 2.16 has 6 in the hundredths place, so 2.16 will go third to last.
Now look at the thousandths place. 2.1062 has 6 while 2.109 has 9, and 6 is less than 9. That means 2.1062 is less than 2.109 so 2.1062 will be first and 2.109 will be second.
The answer is 2.1062, 2.109, 2.16, 2.6.