Answer:
If Delaware was proportional to Alabama in enrollment to the district, it would have approximately 37 districts.
Here's how I calculated it:
The ratio of students to districts in Alabama is 630,683/137 = 4,603 students per district. If Delaware had the same ratio of students to districts, it would have 120,475/4,603 = 26.16 districts. Rounding to the nearest whole number, Delaware would have approximately 26 districts if it was proportional to Alabama in enrollment to the district.