The ornamental design for a multifunctionalfitnessmachine, as shown and described.
1. Multifunctional fitness machine
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Left
1.5 : Right
1.6 : Top
1.7 : Bottom
The design shows a new multifunctional fitness machine; the features shown in broken lines in the drawings depict environmental subject matter only, and form no part of the claimed designs.