Finding the Fourth Proportional to 22,359.34, 30,855.26 and 12,287.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,359.34 : 30,855.26 = 12,287.78 : x
2. Step 2: Convert to fraction form
   22,359.34/30,855.26 = 12,287.78/x
3. Step 3: Cross multiply
   22,359.34x = 30,855.26 × 12,287.78
4. Step 4: Simplify right side
   22,359.34x = 379,142,431.01
5. Step 5: Solve for x
   x = 379,142,431.01/22,359.34
6. Step 6: Final answer
   x = 16,956.78