Finding the Fourth Proportional to 13,531.89, 18,661.91 and 8,496.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,531.89 : 18,661.91 = 8,496.58 : x
2. Step 2: Convert to fraction form
   13,531.89/18,661.91 = 8,496.58/x
3. Step 3: Cross multiply
   13,531.89x = 18,661.91 × 8,496.58
4. Step 4: Simplify right side
   13,531.89x = 158,562,411.27
5. Step 5: Solve for x
   x = 158,562,411.27/13,531.89
6. Step 6: Final answer
   x = 11,717.68