Finding the Third Proportional to 90,445.50 and 196,960.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,445.50 : 196,960.50 = 196,960.50 : x
2. Step 2: Convert to fraction form
   90,445.50/196,960.50 = 196,960.50/x
3. Step 3: Cross multiply
   90,445.50x = 196,960.50 × 196,960.50
4. Step 4: Simplify right side
   90,445.50x = 38,793,438,560.25
5. Step 5: Solve for x
   x = 38,793,438,560.25/90,445.50
6. Step 6: Final answer
   x = 428,915.08