Finding the Fourth Proportional to 31,818.54, 47,724.12 and 8,446.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,818.54 : 47,724.12 = 8,446.80 : x
2. Step 2: Convert to fraction form
   31,818.54/47,724.12 = 8,446.80/x
3. Step 3: Cross multiply
   31,818.54x = 47,724.12 × 8,446.80
4. Step 4: Simplify right side
   31,818.54x = 403,116,096.82
5. Step 5: Solve for x
   x = 403,116,096.82/31,818.54
6. Step 6: Final answer
   x = 12,669.22