Finding the Fourth Proportional to 21,743.46, 30,005.49 and 12,311.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,743.46 : 30,005.49 = 12,311.82 : x
2. Step 2: Convert to fraction form
   21,743.46/30,005.49 = 12,311.82/x
3. Step 3: Cross multiply
   21,743.46x = 30,005.49 × 12,311.82
4. Step 4: Simplify right side
   21,743.46x = 369,422,191.89
5. Step 5: Solve for x
   x = 369,422,191.89/21,743.46
6. Step 6: Final answer
   x = 16,990.04