Finding the Fourth Proportional to 13,481.25, 18,615.59 and 8,453.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,481.25 : 18,615.59 = 8,453.89 : x
2. Step 2: Convert to fraction form
   13,481.25/18,615.59 = 8,453.89/x
3. Step 3: Cross multiply
   13,481.25x = 18,615.59 × 8,453.89
4. Step 4: Simplify right side
   13,481.25x = 157,374,150.15
5. Step 5: Solve for x
   x = 157,374,150.15/13,481.25
6. Step 6: Final answer
   x = 11,673.56