Finding the Third Proportional to 90,605 and 196,330

Step by Step Solution

1. Step 1: Write the proportion equation
   90,605 : 196,330 = 196,330 : x
2. Step 2: Convert to fraction form
   90,605/196,330 = 196,330/x
3. Step 3: Cross multiply
   90,605x = 196,330 × 196,330
4. Step 4: Simplify right side
   90,605x = 38,545,468,900
5. Step 5: Solve for x
   x = 38,545,468,900/90,605
6. Step 6: Final answer
   x = 425,423.20