Finding the Fourth Proportional to 12,013.72, 18,008.22 and 5,764.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,013.72 : 18,008.22 = 5,764.37 : x
2. Step 2: Convert to fraction form
   12,013.72/18,008.22 = 5,764.37/x
3. Step 3: Cross multiply
   12,013.72x = 18,008.22 × 5,764.37
4. Step 4: Simplify right side
   12,013.72x = 103,805,974.70
5. Step 5: Solve for x
   x = 103,805,974.70/12,013.72
6. Step 6: Final answer
   x = 8,640.62