Finding the Fourth Proportional to 12,016.26, 18,019.53 and 4,991.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,016.26 : 18,019.53 = 4,991.49 : x
2. Step 2: Convert to fraction form
   12,016.26/18,019.53 = 4,991.49/x
3. Step 3: Cross multiply
   12,016.26x = 18,019.53 × 4,991.49
4. Step 4: Simplify right side
   12,016.26x = 89,944,303.80
5. Step 5: Solve for x
   x = 89,944,303.80/12,016.26
6. Step 6: Final answer
   x = 7,485.22