Finding the Third Proportional to 418,366 and 861,500

Step by Step Solution

1. Step 1: Write the proportion equation
   418,366 : 861,500 = 861,500 : x
2. Step 2: Convert to fraction form
   418,366/861,500 = 861,500/x
3. Step 3: Cross multiply
   418,366x = 861,500 × 861,500
4. Step 4: Simplify right side
   418,366x = 742,182,250,000
5. Step 5: Solve for x
   x = 742,182,250,000/418,366
6. Step 6: Final answer
   x = 1,774,002.31