Finding the Fourth Proportional to 12,238.22, 18,351.61 and 7,173.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,238.22 : 18,351.61 = 7,173.96 : x
2. Step 2: Convert to fraction form
   12,238.22/18,351.61 = 7,173.96/x
3. Step 3: Cross multiply
   12,238.22x = 18,351.61 × 7,173.96
4. Step 4: Simplify right side
   12,238.22x = 131,653,629.32
5. Step 5: Solve for x
   x = 131,653,629.32/12,238.22
6. Step 6: Final answer
   x = 10,757.58