$\"\"$

According to Means-extremes Property of proportion: If $\"\"$ , then ad = bc.

$\"\"$ (Cross products) $\"\"$ $\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Divide each side by 1.1)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ ) $\"\"$

The value of $\"\"$ .