Finding the Third Proportional to 91,717 and 189,144

Step by Step Solution

1. Step 1: Write the proportion equation
   91,717 : 189,144 = 189,144 : x
2. Step 2: Convert to fraction form
   91,717/189,144 = 189,144/x
3. Step 3: Cross multiply
   91,717x = 189,144 × 189,144
4. Step 4: Simplify right side
   91,717x = 35,775,452,736
5. Step 5: Solve for x
   x = 35,775,452,736/91,717
6. Step 6: Final answer
   x = 390,063.49