Find the missing number in the proportion.

six sevenths
equalsStartFraction x Over 35 EndFraction

To find the missing number (x) in the proportion, we can set up the equation:

6/7 = x/35

To solve for x, we can cross multiply:

6 * 35 = 7 * x
210 = 7x

Now, divide both sides by 7 to solve for x:

x = 30

Therefore, the missing number in the proportion is 30.