Finding the Fourth Proportional to 16,665.09, 22,997.87 and 9,111.51

Step by Step Solution

1. Step 1: Write the proportion equation
   16,665.09 : 22,997.87 = 9,111.51 : x
2. Step 2: Convert to fraction form
   16,665.09/22,997.87 = 9,111.51/x
3. Step 3: Cross multiply
   16,665.09x = 22,997.87 × 9,111.51
4. Step 4: Simplify right side
   16,665.09x = 209,545,322.48
5. Step 5: Solve for x
   x = 209,545,322.48/16,665.09
6. Step 6: Final answer
   x = 12,573.91