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Company $A$ had a turnover by $50\mathrm{\%}$ higher in the second quarter than in the first quarter. In the third quarter its turnover decreased by $20\mathrm{\%}$ and in the fourth quarter the turnover decreased by another $20\mathrm{\%}$. What was the turnover of company $A$ in the second quarter, if in the fourth quarter it amounted to $1440000$ zlotys?