Iam confuse how to solve this problems

The ratio of selling price to cost price is. 3.65 : 1.72

The cost price is 28.50 and you want to find the selling price so let x replace that spot
x : 28.50

cross multiply 3.65 × 28.50 and 1.72 × x
3.65 × 28.50 = 104.025
1.72 × x = 1.72x

104.025 = 1.72x
x is approximately $60.48

This is too long-standing now get out