Finding the Fourth Proportional to 16,665.16, 22,997.85 and 9,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,665.16 : 22,997.85 = 9,111.50 : x
2. Step 2: Convert to fraction form
   16,665.16/22,997.85 = 9,111.50/x
3. Step 3: Cross multiply
   16,665.16x = 22,997.85 × 9,111.50
4. Step 4: Simplify right side
   16,665.16x = 209,544,910.28
5. Step 5: Solve for x
   x = 209,544,910.28/16,665.16
6. Step 6: Final answer
   x = 12,573.83