Finding the Fourth Proportional to 22,086.62, 30,479.09 and 12,015.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,086.62 : 30,479.09 = 12,015.31 : x
2. Step 2: Convert to fraction form
   22,086.62/30,479.09 = 12,015.31/x
3. Step 3: Cross multiply
   22,086.62x = 30,479.09 × 12,015.31
4. Step 4: Simplify right side
   22,086.62x = 366,215,578.59
5. Step 5: Solve for x
   x = 366,215,578.59/22,086.62
6. Step 6: Final answer
   x = 16,580.88