Finding the Third Proportional to 323,248 and 685,898

Step by Step Solution

1. Step 1: Write the proportion equation
   323,248 : 685,898 = 685,898 : x
2. Step 2: Convert to fraction form
   323,248/685,898 = 685,898/x
3. Step 3: Cross multiply
   323,248x = 685,898 × 685,898
4. Step 4: Simplify right side
   323,248x = 470,456,066,404
5. Step 5: Solve for x
   x = 470,456,066,404/323,248
6. Step 6: Final answer
   x = 1,455,402.87