Finding the Fourth Proportional to 12,016.56, 18,020.20 and 5,772.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,016.56 : 18,020.20 = 5,772.64 : x
2. Step 2: Convert to fraction form
   12,016.56/18,020.20 = 5,772.64/x
3. Step 3: Cross multiply
   12,016.56x = 18,020.20 × 5,772.64
4. Step 4: Simplify right side
   12,016.56x = 104,024,127.33
5. Step 5: Solve for x
   x = 104,024,127.33/12,016.56
6. Step 6: Final answer
   x = 8,656.73