Finding the Third Proportional to 525,456 and 815,291

Step by Step Solution

1. Step 1: Write the proportion equation
   525,456 : 815,291 = 815,291 : x
2. Step 2: Convert to fraction form
   525,456/815,291 = 815,291/x
3. Step 3: Cross multiply
   525,456x = 815,291 × 815,291
4. Step 4: Simplify right side
   525,456x = 664,699,414,681
5. Step 5: Solve for x
   x = 664,699,414,681/525,456
6. Step 6: Final answer
   x = 1,264,995.38