Finding the Third Proportional to 428,874 and 630,834

Step by Step Solution

1. Step 1: Write the proportion equation
   428,874 : 630,834 = 630,834 : x
2. Step 2: Convert to fraction form
   428,874/630,834 = 630,834/x
3. Step 3: Cross multiply
   428,874x = 630,834 × 630,834
4. Step 4: Simplify right side
   428,874x = 397,951,535,556
5. Step 5: Solve for x
   x = 397,951,535,556/428,874
6. Step 6: Final answer
   x = 927,898.49