We use two principles:

The farther a digit is to the left, the more it contributes to the number.
The smaller we can make the digits farther to the right the more we can make the
digits farther to the left. 

So we make the thousands digit large as possible, 9.
We make the ones digit small as possible to be odd, 1. 
Now we make the hundreds digit large as possible, 9.
The sum of those digits is 9+1+9=19.
So the tens digit must be 22-19 = 3

Answer: 9931

Edwin