Finding the Fourth Proportional to 8,654.18, 12,995.85 and 8,586.14

Step by Step Solution

1. Step 1: Write the proportion equation
   8,654.18 : 12,995.85 = 8,586.14 : x
2. Step 2: Convert to fraction form
   8,654.18/12,995.85 = 8,586.14/x
3. Step 3: Cross multiply
   8,654.18x = 12,995.85 × 8,586.14
4. Step 4: Simplify right side
   8,654.18x = 111,584,187.52
5. Step 5: Solve for x
   x = 111,584,187.52/8,654.18
6. Step 6: Final answer
   x = 12,893.68