Finding the Fourth Proportional to 13,085.43, 18,063.86 and 8,609.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,085.43 : 18,063.86 = 8,609.37 : x
2. Step 2: Convert to fraction form
   13,085.43/18,063.86 = 8,609.37/x
3. Step 3: Cross multiply
   13,085.43x = 18,063.86 × 8,609.37
4. Step 4: Simplify right side
   13,085.43x = 155,518,411.32
5. Step 5: Solve for x
   x = 155,518,411.32/13,085.43
6. Step 6: Final answer
   x = 11,884.85