Answer :

Sure, let's solve the given expression step by step. The expression provided is:

[tex]\[ \frac{80.4^2 \times 78000}{\sqrt{100.5 \times 35.7}} \][/tex]

We'll break down the solution into parts:

1. Calculate the square of [tex]\(80.4\)[/tex]:
[tex]\[ 80.4^2 = 80.4 \times 80.4 = 6464.16 \][/tex]

2. Multiply the square by [tex]\(78000\)[/tex]:
[tex]\[ 6464.16 \times 78000 = 504204480.00000006 \][/tex]

So, the numerator of the expression is [tex]\(504204480.00000006\)[/tex].

3. Calculate the product of [tex]\(100.5\)[/tex] and [tex]\(35.7\)[/tex]:
[tex]\[ 100.5 \times 35.7 = 3592.85 \][/tex]

4. Take the square root of the product calculated in step 3:
[tex]\[ \sqrt{3592.85} = 59.89866442584509 \][/tex]

So, the denominator of the expression is [tex]\(59.89866442584509\)[/tex].

5. Divide the numerator by the denominator:
[tex]\[ \frac{504204480.00000006}{59.89866442584509} = 8417624.74727977 \][/tex]

So, the final result for the given expression is:

[tex]\[ \boxed{8417624.74727977} \][/tex]