Answer:
The value of x = 4.7
Explanation:
From the figure we can see aright triangle with height = 4.0 and one angle is 58°
Points to remember
Trigonometric ratios 
Sin θ = Opposite side/Hypotenuse
To find the value of x
Sin 58 = Opposite side/Hypotenuse
 = 4/x
x = 4/Sin (58)
 = 4/0.848
 = 4.71 ≈ 4.7
Therefore the value of x = 4.7