Finding the Fourth Proportional to 16,455.37, 22,711.17 and 12,945.37

Step by Step Solution

1. Step 1: Write the proportion equation
   16,455.37 : 22,711.17 = 12,945.37 : x
2. Step 2: Convert to fraction form
   16,455.37/22,711.17 = 12,945.37/x
3. Step 3: Cross multiply
   16,455.37x = 22,711.17 × 12,945.37
4. Step 4: Simplify right side
   16,455.37x = 294,004,498.78
5. Step 5: Solve for x
   x = 294,004,498.78/16,455.37
6. Step 6: Final answer
   x = 17,866.78