Finding the Fourth Proportional to 8,320.05, 12,479.84 and 3,388.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.05 : 12,479.84 = 3,388.47 : x
2. Step 2: Convert to fraction form
   8,320.05/12,479.84 = 3,388.47/x
3. Step 3: Cross multiply
   8,320.05x = 12,479.84 × 3,388.47
4. Step 4: Simplify right side
   8,320.05x = 42,287,546.50
5. Step 5: Solve for x
   x = 42,287,546.50/8,320.05
6. Step 6: Final answer
   x = 5,082.61