Finding the Fourth Proportional to 13,449.03, 18,556.61 and 8,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,449.03 : 18,556.61 = 8,142.72 : x
2. Step 2: Convert to fraction form
   13,449.03/18,556.61 = 8,142.72/x
3. Step 3: Cross multiply
   13,449.03x = 18,556.61 × 8,142.72
4. Step 4: Simplify right side
   13,449.03x = 151,101,238.67
5. Step 5: Solve for x
   x = 151,101,238.67/13,449.03
6. Step 6: Final answer
   x = 11,235.10