Finding the Fourth Proportional to 22,040.43, 30,415.36 and 12,479.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,040.43 : 30,415.36 = 12,479.59 : x
2. Step 2: Convert to fraction form
   22,040.43/30,415.36 = 12,479.59/x
3. Step 3: Cross multiply
   22,040.43x = 30,415.36 × 12,479.59
4. Step 4: Simplify right side
   22,040.43x = 379,571,222.50
5. Step 5: Solve for x
   x = 379,571,222.50/22,040.43
6. Step 6: Final answer
   x = 17,221.59