Finding the Third Proportional to 3,661.77 and 7,879.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,661.77 : 7,879.78 = 7,879.78 : x
2. Step 2: Convert to fraction form
   3,661.77/7,879.78 = 7,879.78/x
3. Step 3: Cross multiply
   3,661.77x = 7,879.78 × 7,879.78
4. Step 4: Simplify right side
   3,661.77x = 62,090,952.55
5. Step 5: Solve for x
   x = 62,090,952.55/3,661.77
6. Step 6: Final answer
   x = 16,956.54