Finding the Third Proportional to 8,661.94 and 10,279.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,661.94 : 10,279.69 = 10,279.69 : x
2. Step 2: Convert to fraction form
   8,661.94/10,279.69 = 10,279.69/x
3. Step 3: Cross multiply
   8,661.94x = 10,279.69 × 10,279.69
4. Step 4: Simplify right side
   8,661.94x = 105,671,975.10
5. Step 5: Solve for x
   x = 105,671,975.10/8,661.94
6. Step 6: Final answer
   x = 12,199.58