Finding the Third Proportional to 8,406.28 and 18,111.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,406.28 : 18,111.09 = 18,111.09 : x
2. Step 2: Convert to fraction form
   8,406.28/18,111.09 = 18,111.09/x
3. Step 3: Cross multiply
   8,406.28x = 18,111.09 × 18,111.09
4. Step 4: Simplify right side
   8,406.28x = 328,011,716.82
5. Step 5: Solve for x
   x = 328,011,716.82/8,406.28
6. Step 6: Final answer
   x = 39,019.84