Finding the Fourth Proportional to 8,436.08, 12,658.69 and 3,509.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,436.08 : 12,658.69 = 3,509.12 : x
2. Step 2: Convert to fraction form
   8,436.08/12,658.69 = 3,509.12/x
3. Step 3: Cross multiply
   8,436.08x = 12,658.69 × 3,509.12
4. Step 4: Simplify right side
   8,436.08x = 44,420,862.25
5. Step 5: Solve for x
   x = 44,420,862.25/8,436.08
6. Step 6: Final answer
   x = 5,265.58