with (someone's) help
Formal expression meaning 'thanks to the help of' or 'with the assistance of'. Often used in acknowledgments or formal statements.
With his help, the project succeeded.
Thanks to everyone's assistance, we were able to complete this event successfully.
助けによって is a more general and less formal way to say 'with help', whereas 助力によって is a stiffer, more formal expression.
Standard kanji spelling using によって.
Rare kanji spelling using 依って; によって is normally written in kana.
助力 (assistance) + によって (by means of). 助力 is a Sino-Japanese compound, and によって is the te-form of 依る (to depend on), here functioning as a formal case particle.