Finding the Fourth Proportional to 12,443.10, 18,643.05 and 8,058.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.10 : 18,643.05 = 8,058.30 : x
2. Step 2: Convert to fraction form
   12,443.10/18,643.05 = 8,058.30/x
3. Step 3: Cross multiply
   12,443.10x = 18,643.05 × 8,058.30
4. Step 4: Simplify right side
   12,443.10x = 150,231,289.82
5. Step 5: Solve for x
   x = 150,231,289.82/12,443.10
6. Step 6: Final answer
   x = 12,073.46