Finding the Fourth Proportional to 16,617.72, 22,931.82 and 9,165.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,617.72 : 22,931.82 = 9,165.72 : x
2. Step 2: Convert to fraction form
   16,617.72/22,931.82 = 9,165.72/x
3. Step 3: Cross multiply
   16,617.72x = 22,931.82 × 9,165.72
4. Step 4: Simplify right side
   16,617.72x = 210,186,641.21
5. Step 5: Solve for x
   x = 210,186,641.21/16,617.72
6. Step 6: Final answer
   x = 12,648.34