Finding the Third Proportional to 563,877 and 863,677.50

Step by Step Solution

1. Step 1: Write the proportion equation
   563,877 : 863,677.50 = 863,677.50 : x
2. Step 2: Convert to fraction form
   563,877/863,677.50 = 863,677.50/x
3. Step 3: Cross multiply
   563,877x = 863,677.50 × 863,677.50
4. Step 4: Simplify right side
   563,877x = 745,938,824,006.25
5. Step 5: Solve for x
   x = 745,938,824,006.25/563,877
6. Step 6: Final answer
   x = 1,322,875.07