Finding the Third Proportional to 8,580 and 12,018

Step by Step Solution

1. Step 1: Write the proportion equation
   8,580 : 12,018 = 12,018 : x
2. Step 2: Convert to fraction form
   8,580/12,018 = 12,018/x
3. Step 3: Cross multiply
   8,580x = 12,018 × 12,018
4. Step 4: Simplify right side
   8,580x = 144,432,324
5. Step 5: Solve for x
   x = 144,432,324/8,580
6. Step 6: Final answer
   x = 16,833.60