correct answer is: c) 81

Explanation

Let, the number is ‘x’
According to the question,
36\times75\times x=218700
\rightarrow x=\large\frac{218700}{36\times75}
\rightarrow x=81
\therefore The number is 81 .
Ans: The number is 81.

Other ways to phrase this particular query are:

1. What is the third number when the product of 36 and 75 is multiplied by it, resulting in 218700?
2. Given that the product of 36, 75, and another number is 218700, what is the value of the third number?
3. When 36 and 75 are multiplied by a certain number, the result is 218700. What is that number?
4. Calculate the unknown number if the product of 36, 75, and it results in 218700.
5. Find the missing number if the product of 36, 75, and the unknown number equals 218700.