Finding the Fourth Proportional to 31,951.78, 47,921.42 and 12,225.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,951.78 : 47,921.42 = 12,225.62 : x
2. Step 2: Convert to fraction form
   31,951.78/47,921.42 = 12,225.62/x
3. Step 3: Cross multiply
   31,951.78x = 47,921.42 × 12,225.62
4. Step 4: Simplify right side
   31,951.78x = 585,869,070.78
5. Step 5: Solve for x
   x = 585,869,070.78/31,951.78
6. Step 6: Final answer
   x = 18,336.04