Finding the Fourth Proportional to 8,540.72, 12,811.47 and 2,617.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,540.72 : 12,811.47 = 2,617.18 : x
2. Step 2: Convert to fraction form
   8,540.72/12,811.47 = 2,617.18/x
3. Step 3: Cross multiply
   8,540.72x = 12,811.47 × 2,617.18
4. Step 4: Simplify right side
   8,540.72x = 33,529,923.05
5. Step 5: Solve for x
   x = 33,529,923.05/8,540.72
6. Step 6: Final answer
   x = 3,925.89