Finding the Third Proportional to 3,866.06 and 8,278.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,866.06 : 8,278.69 = 8,278.69 : x
2. Step 2: Convert to fraction form
   3,866.06/8,278.69 = 8,278.69/x
3. Step 3: Cross multiply
   3,866.06x = 8,278.69 × 8,278.69
4. Step 4: Simplify right side
   3,866.06x = 68,536,666.72
5. Step 5: Solve for x
   x = 68,536,666.72/3,866.06
6. Step 6: Final answer
   x = 17,727.77