Finding the Fourth Proportional to 20,128.27, 30,158.81 and 8,866.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,128.27 : 30,158.81 = 8,866.83 : x
2. Step 2: Convert to fraction form
   20,128.27/30,158.81 = 8,866.83/x
3. Step 3: Cross multiply
   20,128.27x = 30,158.81 × 8,866.83
4. Step 4: Simplify right side
   20,128.27x = 267,413,041.27
5. Step 5: Solve for x
   x = 267,413,041.27/20,128.27
6. Step 6: Final answer
   x = 13,285.45