Finding the Fourth Proportional to 21,951.84, 30,293.46 and 12,520.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,951.84 : 30,293.46 = 12,520.38 : x
2. Step 2: Convert to fraction form
   21,951.84/30,293.46 = 12,520.38/x
3. Step 3: Cross multiply
   21,951.84x = 30,293.46 × 12,520.38
4. Step 4: Simplify right side
   21,951.84x = 379,285,630.71
5. Step 5: Solve for x
   x = 379,285,630.71/21,951.84
6. Step 6: Final answer
   x = 17,278.08