Finding the Third Proportional to 90,450 and 196,020

Step by Step Solution

1. Step 1: Write the proportion equation
   90,450 : 196,020 = 196,020 : x
2. Step 2: Convert to fraction form
   90,450/196,020 = 196,020/x
3. Step 3: Cross multiply
   90,450x = 196,020 × 196,020
4. Step 4: Simplify right side
   90,450x = 38,423,840,400
5. Step 5: Solve for x
   x = 38,423,840,400/90,450
6. Step 6: Final answer
   x = 424,807.52