Finding the Third Proportional to 90,558 and 196,673

Step by Step Solution

1. Step 1: Write the proportion equation
   90,558 : 196,673 = 196,673 : x
2. Step 2: Convert to fraction form
   90,558/196,673 = 196,673/x
3. Step 3: Cross multiply
   90,558x = 196,673 × 196,673
4. Step 4: Simplify right side
   90,558x = 38,680,268,929
5. Step 5: Solve for x
   x = 38,680,268,929/90,558
6. Step 6: Final answer
   x = 427,132.54