Finding the Fourth Proportional to 12,673.54, 17,481.25 and 8,129.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,673.54 : 17,481.25 = 8,129.03 : x
2. Step 2: Convert to fraction form
   12,673.54/17,481.25 = 8,129.03/x
3. Step 3: Cross multiply
   12,673.54x = 17,481.25 × 8,129.03
4. Step 4: Simplify right side
   12,673.54x = 142,105,477.64
5. Step 5: Solve for x
   x = 142,105,477.64/12,673.54
6. Step 6: Final answer
   x = 11,212.77