Write-Host -NoNewLine " "

Write-Host " "

*
 ***
 *****
 *******
 *********

$x = [int] (Read-Host "Write number")
for($i=1; $i -le $x; $i++){
#changed -le $x to -le $x - $i
for($k=1; $k -le $x -$i; $k++ ){
    Write-Host -NoNewLine " "
}

for($j=1; $j -le 2 * $i - 1; $j++){
    Write-Host -NoNewLine "*"
}

Write-Host " "

*
   ***
  *****
 *******
*********