Finding the Fourth Proportional to 12,165.78, 16,789.04 and 7,133.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,165.78 : 16,789.04 = 7,133.86 : x
2. Step 2: Convert to fraction form
   12,165.78/16,789.04 = 7,133.86/x
3. Step 3: Cross multiply
   12,165.78x = 16,789.04 × 7,133.86
4. Step 4: Simplify right side
   12,165.78x = 119,770,660.89
5. Step 5: Solve for x
   x = 119,770,660.89/12,165.78
6. Step 6: Final answer
   x = 9,844.88