TAKOBOTO

By means of, via, through - method by which you do / achieve something
Inform by letter
道具や手段を表す。〜で。

Add formation 

かれはひといちばいのどりょくをもってゆうしょうカップをてにすることができた

with his amazing efforts, we were able to get the champion's cup

こんななんもんは、ゆうしゅうなかれのずのうをもってしてもかいけつできないだろう。

Even with his brilliant mind, such a difficult problem cannot be resolved.

みをもってそのしごとのたいへんさをしった

I learned [from experience / firsthand] how hard the work was.

かれのさこをもってすれば，このもんだいのかいけつはよういであろう

With his ability, he should be able to solve the problem easily.

Ref # Kanzen Master Level 1 - p71 - no.68

LR

On the difference between [womotte1] and [womotte2]
[womotte1] is a Time phrase
meaning "at" - marks beginnings, ends, or borders between times.
It is often used as a greeting to お客 with the extended form をもちまして.
[womotte2] is the method by which you do something - victory achieved via effort, announcement made via a blackboard.

Both are formal, both are NOUN + をもって
be careful.

LR