Finding the Third Proportional to 90,445.50 and 196,958.25

Step by Step Solution

1. Step 1: Write the proportion equation
   90,445.50 : 196,958.25 = 196,958.25 : x
2. Step 2: Convert to fraction form
   90,445.50/196,958.25 = 196,958.25/x
3. Step 3: Cross multiply
   90,445.50x = 196,958.25 × 196,958.25
4. Step 4: Simplify right side
   90,445.50x = 38,792,552,243.06
5. Step 5: Solve for x
   x = 38,792,552,243.06/90,445.50
6. Step 6: Final answer
   x = 428,905.28