Finding the Fourth Proportional to 20,499.42, 28,289.94 and 11,425.59

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499.42 : 28,289.94 = 11,425.59 : x
2. Step 2: Convert to fraction form
   20,499.42/28,289.94 = 11,425.59/x
3. Step 3: Cross multiply
   20,499.42x = 28,289.94 × 11,425.59
4. Step 4: Simplify right side
   20,499.42x = 323,229,255.56
5. Step 5: Solve for x
   x = 323,229,255.56/20,499.42
6. Step 6: Final answer
   x = 15,767.73