Finding the Third Proportional to 90,620 and 196,812

Step by Step Solution

1. Step 1: Write the proportion equation
   90,620 : 196,812 = 196,812 : x
2. Step 2: Convert to fraction form
   90,620/196,812 = 196,812/x
3. Step 3: Cross multiply
   90,620x = 196,812 × 196,812
4. Step 4: Simplify right side
   90,620x = 38,734,963,344
5. Step 5: Solve for x
   x = 38,734,963,344/90,620
6. Step 6: Final answer
   x = 427,443.87