Finding the Third Proportional to 318,092 and 686,004

Step by Step Solution

1. Step 1: Write the proportion equation
   318,092 : 686,004 = 686,004 : x
2. Step 2: Convert to fraction form
   318,092/686,004 = 686,004/x
3. Step 3: Cross multiply
   318,092x = 686,004 × 686,004
4. Step 4: Simplify right side
   318,092x = 470,601,488,016
5. Step 5: Solve for x
   x = 470,601,488,016/318,092
6. Step 6: Final answer
   x = 1,479,450.88