Finding the Third Proportional to 619,209 and 871,981.50

Step by Step Solution

1. Step 1: Write the proportion equation
   619,209 : 871,981.50 = 871,981.50 : x
2. Step 2: Convert to fraction form
   619,209/871,981.50 = 871,981.50/x
3. Step 3: Cross multiply
   619,209x = 871,981.50 × 871,981.50
4. Step 4: Simplify right side
   619,209x = 760,351,736,342.25
5. Step 5: Solve for x
   x = 760,351,736,342.25/619,209
6. Step 6: Final answer
   x = 1,227,940.38