Here we can rearrange the question in an algebraic form (equation) ,
Taking X as the number we have to find,
178 * (3/10)% * X = 1383.608
Now find whats 178 * (3/10)%,
That is ,
178 * 3 = 534 , and dividing it by 10 gives - 53.4
Since it is percentage ,
Its 53.4% also we can write it as ,
53.4/100
Now the whole algebraic equation can be written as ,
(53.4/100) * X = 1383.608
Now we have to subject X to find the number by cross multiplying ,
So it will be,
X = (1383.608 * 100) / 53.4
From there ,
X = 2591.026217
You can round it off to
X = 2591.03 .
Hope it helps...