Finding the Fourth Proportional to 8,662.05, 12,969.60 and 4,493.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,662.05 : 12,969.60 = 4,493.31 : x
2. Step 2: Convert to fraction form
   8,662.05/12,969.60 = 4,493.31/x
3. Step 3: Cross multiply
   8,662.05x = 12,969.60 × 4,493.31
4. Step 4: Simplify right side
   8,662.05x = 58,276,433.38
5. Step 5: Solve for x
   x = 58,276,433.38/8,662.05
6. Step 6: Final answer
   x = 6,727.79