(78т52кг:26-9ц74кг)×72сот+10т728кг

First, let's solve the division in the parentheses:
78т52кг ÷ 26 = 3т2кг
9ц74кг ÷ 26 = 3ц5кг

Now subtract the two results:
3т2кг - 3ц5кг = 270кг

Next, multiply the result by 72:
270кг × 72сот = 19440кг

Finally, add 10т728кг to the result:
19440кг + 10т728кг = 29088кг

Therefore, the final answer is 29088кг.