Jīngguò cháng shíjiān de tǎolùn, wǒmen zuìzhōng dáchéng le yīzhì.
After a long discussion, we finally reached an agreement.
Tips
usage
最终 is more formal than 最后 (zuìhòu). Both mean 'finally/in the end', but 最终 emphasizes the conclusion after a long process, while 最后 simply means 'last'.
grammar
Can be used as an adjective (最终结果 = final result) or adverb (最终决定 = ultimately decided).