Finding the Third Proportional to 85.43 and 190.79

Step by Step Solution

1. Step 1: Write the proportion equation
   85.43 : 190.79 = 190.79 : x
2. Step 2: Convert to fraction form
   85.43/190.79 = 190.79/x
3. Step 3: Cross multiply
   85.43x = 190.79 × 190.79
4. Step 4: Simplify right side
   85.43x = 36,401.96
5. Step 5: Solve for x
   x = 36,401.96/85.43
6. Step 6: Final answer
   x = 426.10