Finding the Fourth Proportional to 16,238.64, 22,408.56 and 9,165.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,238.64 : 22,408.56 = 9,165.72 : x
2. Step 2: Convert to fraction form
   16,238.64/22,408.56 = 9,165.72/x
3. Step 3: Cross multiply
   16,238.64x = 22,408.56 × 9,165.72
4. Step 4: Simplify right side
   16,238.64x = 205,390,586.56
5. Step 5: Solve for x
   x = 205,390,586.56/16,238.64
6. Step 6: Final answer
   x = 12,648.26