Finding the Fourth Proportional to 20,548.28, 30,819.59 and 8,859.98

Step by Step Solution

1. Step 1: Write the proportion equation
   20,548.28 : 30,819.59 = 8,859.98 : x
2. Step 2: Convert to fraction form
   20,548.28/30,819.59 = 8,859.98/x
3. Step 3: Cross multiply
   20,548.28x = 30,819.59 × 8,859.98
4. Step 4: Simplify right side
   20,548.28x = 273,061,016.98
5. Step 5: Solve for x
   x = 273,061,016.98/20,548.28
6. Step 6: Final answer
   x = 13,288.75