Why not just split it up on white space?

my @strings = (
    'Abc     21223.7   21225.33   22270.3   22280.1',
    'Def    21600.23  24567.43'
);

foreach (@strings) {
    my @arr = split(/\s+/, $_);
    print join(' - ', @arr), "\n";
}
[download]

gives me:

Abc - 21223.7 - 21225.33 - 22270.3 - 22280.1
Def - 21600.23 - 24567.43
[download]

All of your numeric values would be in $arr[1] to $arr[$#arr]