Finding the Third Proportional to 619,365 and 905,144

Step by Step Solution

1. Step 1: Write the proportion equation
   619,365 : 905,144 = 905,144 : x
2. Step 2: Convert to fraction form
   619,365/905,144 = 905,144/x
3. Step 3: Cross multiply
   619,365x = 905,144 × 905,144
4. Step 4: Simplify right side
   619,365x = 819,285,660,736
5. Step 5: Solve for x
   x = 819,285,660,736/619,365
6. Step 6: Final answer
   x = 1,322,783.27