Finding the Fourth Proportional to 8,255.36, 12,387.60 and 3,638.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,255.36 : 12,387.60 = 3,638.24 : x
2. Step 2: Convert to fraction form
   8,255.36/12,387.60 = 3,638.24/x
3. Step 3: Cross multiply
   8,255.36x = 12,387.60 × 3,638.24
4. Step 4: Simplify right side
   8,255.36x = 45,069,061.82
5. Step 5: Solve for x
   x = 45,069,061.82/8,255.36
6. Step 6: Final answer
   x = 5,459.37