Finding the Third Proportional to 499,869 and 712,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   499,869 : 712,408.50 = 712,408.50 : x
2. Step 2: Convert to fraction form
   499,869/712,408.50 = 712,408.50/x
3. Step 3: Cross multiply
   499,869x = 712,408.50 × 712,408.50
4. Step 4: Simplify right side
   499,869x = 507,525,870,872.25
5. Step 5: Solve for x
   x = 507,525,870,872.25/499,869
6. Step 6: Final answer
   x = 1,015,317.75