The ornamental design for a portableelectronicdevice, as shown and described.
FIG. 1 is a bottom right front perspective view of a portable electronic device showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an enlarged view of the portion encircled in FIG. 6.
The even dashed broken lines represent portions of the portable electronic device that form no part of the claimed design. In FIGS. 6 and 8, the uneven length dot-dot-dash broken lines encircling a portion of the claimed design are illustrating a boundary of an enlarged view and form no part of the claimed design.