This is the 16430th most frequent Russian word.
росте
The word "росте" is not standalone Russian; it may be a conjugated or misspelled form. Likely, it refers to "растёт," meaning "grows."
In this sentence, "росте" (growth) is used as a noun in the prepositional case to denote the state of economic growth.
Экономика находится в быстром росте.
The economy is experiencing rapid growth.
Here, "росте" (growth/height) refers to physical height and is used in the prepositional case to attribute traits or qualities observed in his physical stature.
В его росте видна спортивная подготовка.
His height shows evidence of athletic training.
In this sentence, "росте" (growth) again serves as a noun in the prepositional case, describing their belief in increased revenues or benefits of the company.