Your solving for x. the triangle is proportional.

The final price of the sweater after all discounts are applied will be $129.38

Explanation

A cashmere sweater has an original price of $345

So, the clearance price after 50% marked down will be: dollar

Now, the additional markdown is 25% of the clearance price. So, the additional marked down amount dollar

So, the final price of the sweater after all discounts are applied will be : = $ 129.38  (Rounding to the nearest cent)