Finding the Third Proportional to 90,385.50 and 196,856

Step by Step Solution

1. Step 1: Write the proportion equation
   90,385.50 : 196,856 = 196,856 : x
2. Step 2: Convert to fraction form
   90,385.50/196,856 = 196,856/x
3. Step 3: Cross multiply
   90,385.50x = 196,856 × 196,856
4. Step 4: Simplify right side
   90,385.50x = 38,752,284,736
5. Step 5: Solve for x
   x = 38,752,284,736/90,385.50
6. Step 6: Final answer
   x = 428,744.49