Finding the Third Proportional to 538,604 and 819,099

Step by Step Solution

1. Step 1: Write the proportion equation
   538,604 : 819,099 = 819,099 : x
2. Step 2: Convert to fraction form
   538,604/819,099 = 819,099/x
3. Step 3: Cross multiply
   538,604x = 819,099 × 819,099
4. Step 4: Simplify right side
   538,604x = 670,923,171,801
5. Step 5: Solve for x
   x = 670,923,171,801/538,604
6. Step 6: Final answer
   x = 1,245,670.61