28.9, 19.64, 123.697 and 0.354
Converting the decimals into like decimals:
28.900, 19.640, 123.697 and 0.354
Let us write the given numbers in the column form.
Now, adding:
28.900
19.640
123.697
0.354
172.591
Hence, the sum of the given numbers is 172.591.