Answer:
x = 98 mm
Step-by-step explanation:
129.2 / 68 = 57 / (x - 68)
Cross multiply
129.2(x - 68) = 68 * 57
129.2x - 8785.6 = 3876
129.2x = 12661.6
x = 12661.6 / 129.2
x = 98
