Finding the Fourth Proportional to 8,662.21, 12,991.89 and 3,114.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,662.21 : 12,991.89 = 3,114.52 : x
2. Step 2: Convert to fraction form
   8,662.21/12,991.89 = 3,114.52/x
3. Step 3: Cross multiply
   8,662.21x = 12,991.89 × 3,114.52
4. Step 4: Simplify right side
   8,662.21x = 40,463,480.44
5. Step 5: Solve for x
   x = 40,463,480.44/8,662.21
6. Step 6: Final answer
   x = 4,671.27