For this case we make a rule of three to determine the initial amount of euros:
1 euro ----------------> 1.3687 dollars
x ------------------------> 250 dollars
Where "x" represents the amount of euros equivalent to 250 dollars.
![x = \frac {250 * 1} {1.3687}\\x = 182.655074158](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%20%7B250%20%2A%201%7D%20%7B1.3687%7D%5C%5Cx%20%3D%20182.655074158)
Thus, Phelan received 182.655074158 euros.
If I spend 150 euros, we have:
![182.655074158-150 = 32.655074158](https://tex.z-dn.net/?f=182.655074158-150%20%3D%2032.655074158)
Now, we make the conversion to know the amount of dollars equivalent:
1 euro ----------------> 1.3687 dollars
32,655074158 ------------------------> y
Where "y" represents the amount of dollars:
![y = \frac {32.655074158 * 1.3687} {1}\\y = 44,695](https://tex.z-dn.net/?f=y%20%3D%20%5Cfrac%20%7B32.655074158%20%2A%201.3687%7D%20%7B1%7D%5C%5Cy%20%3D%2044%2C695)
So, Phelan has 44,695 dollars
Answer:
$ 44,695