Finding the Fourth Proportional to 8,320.55, 12,480.59 and 3,388.97

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.55 : 12,480.59 = 3,388.97 : x
2. Step 2: Convert to fraction form
   8,320.55/12,480.59 = 3,388.97/x
3. Step 3: Cross multiply
   8,320.55x = 12,480.59 × 3,388.97
4. Step 4: Simplify right side
   8,320.55x = 42,296,328.15
5. Step 5: Solve for x
   x = 42,296,328.15/8,320.55
6. Step 6: Final answer
   x = 5,083.36