how resolve this easy proportion

how resolve this easy proportion

100000:51,65=3450000:x

Hello Guest!

$100,000:51.65=3,450,000:x\\ 100,000x=51.65\cdot 3,450,000\\ x=\frac{51.65\cdot 3,450,000}{100,000}$     inside x inside = outside x outside!

$x=1781.925$

  !