Finding the Fourth Proportional to 21,930.86, 30,245.46 and 15,544.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930.86 : 30,245.46 = 15,544.82 : x
2. Step 2: Convert to fraction form
   21,930.86/30,245.46 = 15,544.82/x
3. Step 3: Cross multiply
   21,930.86x = 30,245.46 × 15,544.82
4. Step 4: Simplify right side
   21,930.86x = 470,160,231.52
5. Step 5: Solve for x
   x = 470,160,231.52/21,930.86
6. Step 6: Final answer
   x = 21,438.29