Let's begin by listing out the information given to us:
The number is 4.3186
We are to round the number to the place of the underlined digit
The underlined number is 1 (the hundredth place value)
If the number after 1 is less than 5, we round down & if the number is 5 or more, we round up. The number after 1 is 8 (greater than 5). We have:
Hence, the rounded number is 4.32