Answer
Breakeven Revenues = $1,728,000 \div 0.48 = 3,600,000$
Work Step by Step
Breakeven Revenues with variable costs at 52% of revenues:
Breakeven Revenues = Fixed Costs$ \div$ Contribution Margin Ratio
Contribution Margin Ratio (New) = 1 - Variable Costs as % of Revenues
Contribution Margin Ratio (New) = 1 - 0.52 = 0.48