Finding the Third Proportional to 9,518 and 12,009

Step by Step Solution

1. Step 1: Write the proportion equation
   9,518 : 12,009 = 12,009 : x
2. Step 2: Convert to fraction form
   9,518/12,009 = 12,009/x
3. Step 3: Cross multiply
   9,518x = 12,009 × 12,009
4. Step 4: Simplify right side
   9,518x = 144,216,081
5. Step 5: Solve for x
   x = 144,216,081/9,518
6. Step 6: Final answer
   x = 15,151.93