This is the 14474th most frequent Russian word.
очередному
"Очередному" means "to the next" or "to the following" in English, depending on context.
Here, "очередному" describes "гостю" (guest), again in dative case, to indicate the next person in line or sequence.
Она передала ключи очередному гостю.
She handed the keys to the next guest.
In this sentence, "очередному" is used as a dative case modifier of the noun "сотруднику" (employee), meaning "next" or "following in sequence."
Очередному сотруднику было поручено задание.
The next employee was assigned a task.
In this example, "очередному" modifies "мероприятию" (event) in the dative case, emphasizing the importance of the next or upcoming event.