Finding the Third Proportional to 525,840 and 858,564

Step by Step Solution

1. Step 1: Write the proportion equation
   525,840 : 858,564 = 858,564 : x
2. Step 2: Convert to fraction form
   525,840/858,564 = 858,564/x
3. Step 3: Cross multiply
   525,840x = 858,564 × 858,564
4. Step 4: Simplify right side
   525,840x = 737,132,142,096
5. Step 5: Solve for x
   x = 737,132,142,096/525,840
6. Step 6: Final answer
   x = 1,401,818.31