That's easy enough to do. Just take the current maintenance fee per point, and multiply by 1.03 or by 1.04. Repeat 34 times (for 2042) or 49 times (for 2057).
To put into perspective, be sure to take the cost of a regular WDW hotel room today, maybe at the Poly, or Carribbean beach, and do the same. That's where you'll see the big difference.
I did a couple of quick calculations.
If today dues on
DVC are $4.50/point, then in 34 years at 4% inflation they'll be $17.07/point. If a DVC Studio requires 12 points per night, then today it costs $54/night in dues. In 34 years it'll be $204/night in dues.
If today a regular non-DVC, WDW hotel, costs $149/night, then it's about $166/night including taxes. In 34 years it'll be $629/night, including taxes.
If each stay (DVC or regular hotel room) were for 5-nights each year, then over the years, the DVC owner will have spent $19,616 in dues for their annual 5-night vacation in a Studio at 12 points per night.
The non-DVC owner, who stays in the hotel room that currently costs $149/night, will have spent $60,301 for those same 5-night annual vacations over the same 34 year span.