Finding the Fourth Proportional to 12,020.10, 18,019.14 and 5,442.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,020.10 : 18,019.14 = 5,442.72 : x
2. Step 2: Convert to fraction form
   12,020.10/18,019.14 = 5,442.72/x
3. Step 3: Cross multiply
   12,020.10x = 18,019.14 × 5,442.72
4. Step 4: Simplify right side
   12,020.10x = 98,073,133.66
5. Step 5: Solve for x
   x = 98,073,133.66/12,020.10
6. Step 6: Final answer
   x = 8,159.09