Finding the Fourth Proportional to 20,018.72, 30,004.63 and 8,165.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,018.72 : 30,004.63 = 8,165.10 : x
2. Step 2: Convert to fraction form
   20,018.72/30,004.63 = 8,165.10/x
3. Step 3: Cross multiply
   20,018.72x = 30,004.63 × 8,165.10
4. Step 4: Simplify right side
   20,018.72x = 244,990,804.41
5. Step 5: Solve for x
   x = 244,990,804.41/20,018.72
6. Step 6: Final answer
   x = 12,238.09