Finding the Third Proportional to 90,399 and 196,654

Step by Step Solution

1. Step 1: Write the proportion equation
   90,399 : 196,654 = 196,654 : x
2. Step 2: Convert to fraction form
   90,399/196,654 = 196,654/x
3. Step 3: Cross multiply
   90,399x = 196,654 × 196,654
4. Step 4: Simplify right side
   90,399x = 38,672,795,716
5. Step 5: Solve for x
   x = 38,672,795,716/90,399
6. Step 6: Final answer
   x = 427,801.15