Finding the Third Proportional to 3,639.94 and 7,961.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,639.94 : 7,961.39 = 7,961.39 : x
2. Step 2: Convert to fraction form
   3,639.94/7,961.39 = 7,961.39/x
3. Step 3: Cross multiply
   3,639.94x = 7,961.39 × 7,961.39
4. Step 4: Simplify right side
   3,639.94x = 63,383,740.68
5. Step 5: Solve for x
   x = 63,383,740.68/3,639.94
6. Step 6: Final answer
   x = 17,413.41