Finding the Third Proportional to 12,081.66 and 18,111.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081.66 : 18,111.09 = 18,111.09 : x
2. Step 2: Convert to fraction form
   12,081.66/18,111.09 = 18,111.09/x
3. Step 3: Cross multiply
   12,081.66x = 18,111.09 × 18,111.09
4. Step 4: Simplify right side
   12,081.66x = 328,011,716.82
5. Step 5: Solve for x
   x = 328,011,716.82/12,081.66
6. Step 6: Final answer
   x = 27,149.57