Finding the Fourth Proportional to 8,272.50, 12,408.81 and 2,429.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,272.50 : 12,408.81 = 2,429.20 : x
2. Step 2: Convert to fraction form
   8,272.50/12,408.81 = 2,429.20/x
3. Step 3: Cross multiply
   8,272.50x = 12,408.81 × 2,429.20
4. Step 4: Simplify right side
   8,272.50x = 30,143,481.25
5. Step 5: Solve for x
   x = 30,143,481.25/8,272.50
6. Step 6: Final answer
   x = 3,643.82