To estimate the total area of Ohio, Kentucky, and Indiana, we first round each state's area to the nearest hundred:
- Ohio: 44,826 rounds to 44,800
- Kentucky: 40,408 rounds to 40,400
- Indiana: 37,420 rounds to 37,400
Now we add these rounded values together:
\(44,800 + 40,400 + 37,400 = 122,600\)
Thus, the estimated total area of all three states is 122,600 square miles.