Finding the Fourth Proportional to 22,271.98, 30,737.92 and 12,840.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,271.98 : 30,737.92 = 12,840.88 : x
2. Step 2: Convert to fraction form
   22,271.98/30,737.92 = 12,840.88/x
3. Step 3: Cross multiply
   22,271.98x = 30,737.92 × 12,840.88
4. Step 4: Simplify right side
   22,271.98x = 394,701,942.17
5. Step 5: Solve for x
   x = 394,701,942.17/22,271.98
6. Step 6: Final answer
   x = 17,721.91