Finding the Third Proportional to 638,688 and 1,394,934

Step by Step Solution

1. Step 1: Write the proportion equation
   638,688 : 1,394,934 = 1,394,934 : x
2. Step 2: Convert to fraction form
   638,688/1,394,934 = 1,394,934/x
3. Step 3: Cross multiply
   638,688x = 1,394,934 × 1,394,934
4. Step 4: Simplify right side
   638,688x = 1,945,840,864,356
5. Step 5: Solve for x
   x = 1,945,840,864,356/638,688
6. Step 6: Final answer
   x = 3,046,621.93