Finding the Fourth Proportional to 12,016.50, 18,019.72 and 5,775.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,016.50 : 18,019.72 = 5,775.04 : x
2. Step 2: Convert to fraction form
   12,016.50/18,019.72 = 5,775.04/x
3. Step 3: Cross multiply
   12,016.50x = 18,019.72 × 5,775.04
4. Step 4: Simplify right side
   12,016.50x = 104,064,603.79
5. Step 5: Solve for x
   x = 104,064,603.79/12,016.50
6. Step 6: Final answer
   x = 8,660.14