bash-4.1$ cat file
1.351364711.103.7319660.2010-01-01 00:00:00
1.345529841.103.7372875.2010-01-01 00:00:49
1.342955629.103.7455272.2010-01-01 00:01:42
1.339694956.103.7520503.2010-01-01 00:02:28
bash-4.1$ awk -F. '{print $NF,$1"."$2,$3"."$4}' OFS=, file
2010-01-01 00:00:00,1.351364711,103.7319660
2010-01-01 00:00:49,1.345529841,103.7372875
2010-01-01 00:01:42,1.342955629,103.7455272
2010-01-01 00:02:28,1.339694956,103.7520503