Finding the Fourth Proportional to 22,087.47, 30,480.42 and 12,015.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,087.47 : 30,480.42 = 12,015.78 : x
2. Step 2: Convert to fraction form
   22,087.47/30,480.42 = 12,015.78/x
3. Step 3: Cross multiply
   22,087.47x = 30,480.42 × 12,015.78
4. Step 4: Simplify right side
   22,087.47x = 366,246,021.03
5. Step 5: Solve for x
   x = 366,246,021.03/22,087.47
6. Step 6: Final answer
   x = 16,581.62