Setting a property by reflection with a string value

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I’d like to set a property of an object through Reflection, with a value of type string.
So, for instance, suppose I have a Ship class, with a property of Latitude, which is a double.

Here’s what I’d like to do:

Ship ship = new Ship();
string value = "5.5";
PropertyInfo propertyInfo = ship.GetType().GetProperty("Latitude");
propertyInfo.SetValue(ship, value, null);

As is, this throws an ArgumentException:

Object of type ‘System.String’ cannot be converted to type ‘System.Double’.

How can I convert value to the proper type, based on propertyInfo?

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