At a fabrication plant, a hot metal forging has a mass of 75 kg and a specific heat capacity of 430 J/(kg·°C). To harden it, the forging is immersed in 710 kg of oil that has a temperature of 32°C and a specific heat capacity of 2900 J/(kg·°C). The final temperature of the oil and forging at thermal equilibrium is 48°C. Assuming that heat flows only between the forging and the oil, determine the initial temperature of the forging.