Finding the Third Proportional to 196,856.25 and 406,836

Step by Step Solution

1. Step 1: Write the proportion equation
   196,856.25 : 406,836 = 406,836 : x
2. Step 2: Convert to fraction form
   196,856.25/406,836 = 406,836/x
3. Step 3: Cross multiply
   196,856.25x = 406,836 × 406,836
4. Step 4: Simplify right side
   196,856.25x = 165,515,530,896
5. Step 5: Solve for x
   x = 165,515,530,896/196,856.25
6. Step 6: Final answer
   x = 840,793.88