But is it usable, as my release is x.x.2742.x, not x.x.2741.x ?
It is suitable to use the 4_1_2741_40 to X patch so just go ahead.
If yes, am I right to think that I would have to apply the patches with 2 steps :
1/ MonoX_Patch_4_1_2741_40_to_4_5_3057_40.zip 7.03 MB
2/ MonoX_Patch_4_5_3057_40_to_4_5_3200_40.zip 4.48 MB
Yes, you should apply all the patches in the chain.
Let us know if you have any upgrade issues, and please read the following article
before you do so.