Answer:
56 : 28 as 122 : 61
Explanation:
Proportion says that two ratios or fractions are equal.
As per the statement:
56 : 28 :: 122 : ?
Let x be the fourth proportion.
then;
56 : 28 :: 122 : x
by definition of proportion:

by cross multiply we have;

Divide both sides by 56 we have;
x = 61
Therefore, 56 : 28 as 122 : 61