Finding the Fourth Proportional to 31,951.37, 47,929.37 and 12,966.89

Step by Step Solution

1. Step 1: Write the proportion equation
   31,951.37 : 47,929.37 = 12,966.89 : x
2. Step 2: Convert to fraction form
   31,951.37/47,929.37 = 12,966.89/x
3. Step 3: Cross multiply
   31,951.37x = 47,929.37 × 12,966.89
4. Step 4: Simplify right side
   31,951.37x = 621,494,564.08
5. Step 5: Solve for x
   x = 621,494,564.08/31,951.37
6. Step 6: Final answer
   x = 19,451.27