Finding the Fourth Proportional to 16,768.18, 23,139.97 and 9,111.38

Step by Step Solution

1. Step 1: Write the proportion equation
   16,768.18 : 23,139.97 = 9,111.38 : x
2. Step 2: Convert to fraction form
   16,768.18/23,139.97 = 9,111.38/x
3. Step 3: Cross multiply
   16,768.18x = 23,139.97 × 9,111.38
4. Step 4: Simplify right side
   16,768.18x = 210,837,059.86
5. Step 5: Solve for x
   x = 210,837,059.86/16,768.18
6. Step 6: Final answer
   x = 12,573.64