Finding the Third Proportional to 638,288 and 945,108

Step by Step Solution

1. Step 1: Write the proportion equation
   638,288 : 945,108 = 945,108 : x
2. Step 2: Convert to fraction form
   638,288/945,108 = 945,108/x
3. Step 3: Cross multiply
   638,288x = 945,108 × 945,108
4. Step 4: Simplify right side
   638,288x = 893,229,131,664
5. Step 5: Solve for x
   x = 893,229,131,664/638,288
6. Step 6: Final answer
   x = 1,399,413.95