Finding the Fourth Proportional to 8,656.72, 12,986.81 and 2,418.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,656.72 : 12,986.81 = 2,418.52 : x
2. Step 2: Convert to fraction form
   8,656.72/12,986.81 = 2,418.52/x
3. Step 3: Cross multiply
   8,656.72x = 12,986.81 × 2,418.52
4. Step 4: Simplify right side
   8,656.72x = 31,408,859.72
5. Step 5: Solve for x
   x = 31,408,859.72/8,656.72
6. Step 6: Final answer
   x = 3,628.26