Finding the Fourth Proportional to 12,019.28, 18,016.76 and 5,770.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,019.28 : 18,016.76 = 5,770.16 : x
2. Step 2: Convert to fraction form
   12,019.28/18,016.76 = 5,770.16/x
3. Step 3: Cross multiply
   12,019.28x = 18,016.76 × 5,770.16
4. Step 4: Simplify right side
   12,019.28x = 103,959,587.88
5. Step 5: Solve for x
   x = 103,959,587.88/12,019.28
6. Step 6: Final answer
   x = 8,649.40