Finding the Third Proportional to 451,869 and 978,123

Step by Step Solution

1. Step 1: Write the proportion equation
   451,869 : 978,123 = 978,123 : x
2. Step 2: Convert to fraction form
   451,869/978,123 = 978,123/x
3. Step 3: Cross multiply
   451,869x = 978,123 × 978,123
4. Step 4: Simplify right side
   451,869x = 956,724,603,129
5. Step 5: Solve for x
   x = 956,724,603,129/451,869
6. Step 6: Final answer
   x = 2,117,260.98