Let L represent the lowest level of financial backing.
Thus, the second level is 10L and the highest level is 10 * 10L = 100L.
The entrepreneur got 2 highest level backers, 3 second level backers, and 10 lowest level backers, so 2 * 100L + 3 * 10L + 10L = 200L + 30L + 10L = 240L = $12000.
Therefore, the lowest level of financial backing was L = 12000 / 240 = $<<12000/240=50>>50.
Thus, the highest level of financial backing was 10 * 10 * 50 = $<<10*10*50=5000>>5000.
#### 5000