Finding the Third Proportional to 90,422 and 196,918

Step by Step Solution

1. Step 1: Write the proportion equation
   90,422 : 196,918 = 196,918 : x
2. Step 2: Convert to fraction form
   90,422/196,918 = 196,918/x
3. Step 3: Cross multiply
   90,422x = 196,918 × 196,918
4. Step 4: Simplify right side
   90,422x = 38,776,698,724
5. Step 5: Solve for x
   x = 38,776,698,724/90,422
6. Step 6: Final answer
   x = 428,841.42