Finding the Fourth Proportional to 8,706.57, 12,013.56 and 5,168.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,706.57 : 12,013.56 = 5,168.49 : x
2. Step 2: Convert to fraction form
   8,706.57/12,013.56 = 5,168.49/x
3. Step 3: Cross multiply
   8,706.57x = 12,013.56 × 5,168.49
4. Step 4: Simplify right side
   8,706.57x = 62,091,964.72
5. Step 5: Solve for x
   x = 62,091,964.72/8,706.57
6. Step 6: Final answer
   x = 7,131.62