Finding the Fourth Proportional to 8,616.69, 12,912.98 and 4,659.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,616.69 : 12,912.98 = 4,659.39 : x
2. Step 2: Convert to fraction form
   8,616.69/12,912.98 = 4,659.39/x
3. Step 3: Cross multiply
   8,616.69x = 12,912.98 × 4,659.39
4. Step 4: Simplify right side
   8,616.69x = 60,166,586.59
5. Step 5: Solve for x
   x = 60,166,586.59/8,616.69
6. Step 6: Final answer
   x = 6,982.56