Finding the Fourth Proportional to 8,635.26, 12,949.72 and 3,087.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,635.26 : 12,949.72 = 3,087.12 : x
2. Step 2: Convert to fraction form
   8,635.26/12,949.72 = 3,087.12/x
3. Step 3: Cross multiply
   8,635.26x = 12,949.72 × 3,087.12
4. Step 4: Simplify right side
   8,635.26x = 39,977,339.61
5. Step 5: Solve for x
   x = 39,977,339.61/8,635.26
6. Step 6: Final answer
   x = 4,629.55