Finding the Fourth Proportional to 13,072.47, 18,042.89 and 8,596.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.47 : 18,042.89 = 8,596.64 : x
2. Step 2: Convert to fraction form
   13,072.47/18,042.89 = 8,596.64/x
3. Step 3: Cross multiply
   13,072.47x = 18,042.89 × 8,596.64
4. Step 4: Simplify right side
   13,072.47x = 155,108,096.69
5. Step 5: Solve for x
   x = 155,108,096.69/13,072.47
6. Step 6: Final answer
   x = 11,865.25