Finding the Third Proportional to 8,290 and 18,155

Step by Step Solution

1. Step 1: Write the proportion equation
   8,290 : 18,155 = 18,155 : x
2. Step 2: Convert to fraction form
   8,290/18,155 = 18,155/x
3. Step 3: Cross multiply
   8,290x = 18,155 × 18,155
4. Step 4: Simplify right side
   8,290x = 329,604,025
5. Step 5: Solve for x
   x = 329,604,025/8,290
6. Step 6: Final answer
   x = 39,759.23