Finding the Third Proportional to 563,868 and 863,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   563,868 : 863,662.50 = 863,662.50 : x
2. Step 2: Convert to fraction form
   563,868/863,662.50 = 863,662.50/x
3. Step 3: Cross multiply
   563,868x = 863,662.50 × 863,662.50
4. Step 4: Simplify right side
   563,868x = 745,912,913,906.25
5. Step 5: Solve for x
   x = 745,912,913,906.25/563,868
6. Step 6: Final answer
   x = 1,322,850.23