C^1.85 = 89390724.39
1.85 Log C = Log (89390724.39)
C = ?
C^1.85 = 89390724.39 raise each side to (1/1.85)
[C^1.85]^(1/1.85) = 89390724.39^(1/1.85)
C = 89390724.39^(1/1.85) ≈ 19860.76