Finding the Third Proportional to 198,684 and 425,776.50

Step by Step Solution

1. Step 1: Write the proportion equation
   198,684 : 425,776.50 = 425,776.50 : x
2. Step 2: Convert to fraction form
   198,684/425,776.50 = 425,776.50/x
3. Step 3: Cross multiply
   198,684x = 425,776.50 × 425,776.50
4. Step 4: Simplify right side
   198,684x = 181,285,627,952.25
5. Step 5: Solve for x
   x = 181,285,627,952.25/198,684
6. Step 6: Final answer
   x = 912,431.94