Finding the Fourth Proportional to 12,107.78, 16,697.64 and 7,854.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,107.78 : 16,697.64 = 7,854.41 : x
2. Step 2: Convert to fraction form
   12,107.78/16,697.64 = 7,854.41/x
3. Step 3: Cross multiply
   12,107.78x = 16,697.64 × 7,854.41
4. Step 4: Simplify right side
   12,107.78x = 131,150,110.59
5. Step 5: Solve for x
   x = 131,150,110.59/12,107.78
6. Step 6: Final answer
   x = 10,831.89