Here's how to get there:

1. Move the decimal point: Start with the number 22078600. Move the decimal point to the left until you have a number between 1 and 10. In this case, you'll move it 7 places to the left, giving you 2.20786.

2. Exponent: The number of places you moved the decimal point becomes the exponent of 10. Since you moved it 7 places to the left, the exponent is 7.

3. Combine: You now have 2.20786 x 10⁷.