Can you add a class 3 hitch to a 2011 Ford Fiesta sedan?

What is your question?

I need a trailer hitch to carry a carrier for my power wheelchair which weighs 247#. All the wheelchair carriers I've found require a class 3 hitch. I can only find class 1 hitches for my car. I will not exceed the combined weight limit of occupants and cargo, which is 867#. I know nothing about towing obviously, but is there a way to achieve this?

What makes this problem better or worse?

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How long has your 2011 Ford Fiesta had this problem?

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