Finding the Fourth Proportional to 18,443.89, 27,671.37 and 8,589.07

Step by Step Solution

1. Step 1: Write the proportion equation
   18,443.89 : 27,671.37 = 8,589.07 : x
2. Step 2: Convert to fraction form
   18,443.89/27,671.37 = 8,589.07/x
3. Step 3: Cross multiply
   18,443.89x = 27,671.37 × 8,589.07
4. Step 4: Simplify right side
   18,443.89x = 237,671,333.93
5. Step 5: Solve for x
   x = 237,671,333.93/18,443.89
6. Step 6: Final answer
   x = 12,886.18