1. To consider something as appropriate, suitable, or fitting; to deem it advisable or correct to do something
The manager will think proper to make changes to the schedule as needed.
O gerente achará conveniente fazer mudanças no cronograma conforme necessário.
2. To regard as one's duty or responsibility to do something (formal/archaic usage)
He thought proper to inform everyone of the decision.
Ele julgou apropriado informar todos sobre a decisão.