1) To solve the first equation, we can start by multiplying both sides by (x+4.08) to get rid of the fraction:

38,912 * (x + 4.08) = 6.42

Expanding the left side:

38,912x + 38,912 * 4.08 = 6.42

38,912x + 158,721.856 = 6.42

Subtracting 158,721.856 from both sides:

38,912x = -158,715.436

Dividing by 38,912 to solve for x:

x = -4.08

2) For the second equation:

(х-15.7)*3.6 = 155.88

Expanding the left side:

3.6x - 56.52 = 155.88

Adding 56.52 to both sides:

3.6x = 212.4

Dividing by 3.6 to solve for x:

x = 59

3) For the third equation:

53,884 / (x + 5.6) = 7.09

Multiplying both sides by (x + 5.6) to get rid of the fraction:

53,884 = 7.09(x + 5.6)

Expanding the right side:

53,884 = 7.09x + 39.784

Subtracting 39.784 from both sides:

53,844 - 39.784 = 7.09x

14,100 = 7.09x

Dividing by 7.09 to solve for x:

x ≈ 1987.6

4) For the fourth equation:

(62.8 - x) * 4.7 = 255.68

Expanding the left side:

294.16 - 4.7x = 255.68

Subtracting 294.16 from both sides:

-4.7x = -38.48

Dividing by -4.7 to solve for x:

x ≈ 8.17

Therefore, the solutions to the equations are:
1) x = -4.08
2) x = 59
3) x ≈ 1987.6
4) x ≈ 8.17