Answer: through public funding
Step-by-step explanation:
At the time the Erie Canal was built, it was the second longest in the world and established New York's position as a great trading city when it connected the Atlantic ocean to the Great Lakes thereby making goods easier to transport.
From the text it would appear that canals such as the Erie were built through public funding which the State got by borrowing from American capitalists whom they would then have to pay back with interest.