Finding the Third Proportional to 619,218 and 871,993.50

Step by Step Solution

1. Step 1: Write the proportion equation
   619,218 : 871,993.50 = 871,993.50 : x
2. Step 2: Convert to fraction form
   619,218/871,993.50 = 871,993.50/x
3. Step 3: Cross multiply
   619,218x = 871,993.50 × 871,993.50
4. Step 4: Simplify right side
   619,218x = 760,372,664,042.25
5. Step 5: Solve for x
   x = 760,372,664,042.25/619,218
6. Step 6: Final answer
   x = 1,227,956.33