Finding the Third Proportional to 538,608 and 819,105

Step by Step Solution

1. Step 1: Write the proportion equation
   538,608 : 819,105 = 819,105 : x
2. Step 2: Convert to fraction form
   538,608/819,105 = 819,105/x
3. Step 3: Cross multiply
   538,608x = 819,105 × 819,105
4. Step 4: Simplify right side
   538,608x = 670,933,001,025
5. Step 5: Solve for x
   x = 670,933,001,025/538,608
6. Step 6: Final answer
   x = 1,245,679.61