Finding the Fourth Proportional to 22,270.98, 30,736.54 and 12,839.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,270.98 : 30,736.54 = 12,839.88 : x
2. Step 2: Convert to fraction form
   22,270.98/30,736.54 = 12,839.88/x
3. Step 3: Cross multiply
   22,270.98x = 30,736.54 × 12,839.88
4. Step 4: Simplify right side
   22,270.98x = 394,653,485.22
5. Step 5: Solve for x
   x = 394,653,485.22/22,270.98
6. Step 6: Final answer
   x = 17,720.53