Finding the Fourth Proportional to 16,665.79, 22,998.30 and 9,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,665.79 : 22,998.30 = 9,111.88 : x
2. Step 2: Convert to fraction form
   16,665.79/22,998.30 = 9,111.88/x
3. Step 3: Cross multiply
   16,665.79x = 22,998.30 × 9,111.88
4. Step 4: Simplify right side
   16,665.79x = 209,557,749.80
5. Step 5: Solve for x
   x = 209,557,749.80/16,665.79
6. Step 6: Final answer
   x = 12,574.13