Folding only adds numbers together, so the total never changes. Both strips add up to 53. Your largest target number, 26, must be a stack of several cells added together.
Hint 2: the length budget
The strip has 11 cells and the target has 4, so the folds together must remove 7 cells. A fold removes as many cells as its shorter side has.
Hint 3: the first fold
The first fold goes between cell 10 and cell 11, counting cells from the left.
Full solution
Show every fold
Fold 1 of 4
98218466144→9821846618
Fold between cell 10 and cell 11. The right side flips over the left side.
Fold 2 of 4
9821846618→981021410
Fold between cell 6 and cell 7. The right side flips over the left side.
Fold 3 of 4
981021410→9810224
Fold between cell 5 and cell 6. The right side flips over the left side.
Fold 4 of 4
9810224→981026
Fold between cell 4 and cell 5. The right side flips over the left side.