Finding the Fourth Proportional to 13,536.72, 20,315.61 and 8,855.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,536.72 : 20,315.61 = 8,855.46 : x
2. Step 2: Convert to fraction form
   13,536.72/20,315.61 = 8,855.46/x
3. Step 3: Cross multiply
   13,536.72x = 20,315.61 × 8,855.46
4. Step 4: Simplify right side
   13,536.72x = 179,904,071.73
5. Step 5: Solve for x
   x = 179,904,071.73/13,536.72
6. Step 6: Final answer
   x = 13,290.08