Finding the Fourth Proportional to 22,302.71, 30,777.72 and 12,231.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,302.71 : 30,777.72 = 12,231.31 : x
2. Step 2: Convert to fraction form
   22,302.71/30,777.72 = 12,231.31/x
3. Step 3: Cross multiply
   22,302.71x = 30,777.72 × 12,231.31
4. Step 4: Simplify right side
   22,302.71x = 376,451,834.41
5. Step 5: Solve for x
   x = 376,451,834.41/22,302.71
6. Step 6: Final answer
   x = 16,879.20