Finding the Fourth Proportional to 8,321.26, 12,478.84 and 3,388.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,321.26 : 12,478.84 = 3,388.23 : x
2. Step 2: Convert to fraction form
   8,321.26/12,478.84 = 3,388.23/x
3. Step 3: Cross multiply
   8,321.26x = 12,478.84 × 3,388.23
4. Step 4: Simplify right side
   8,321.26x = 42,281,100.72
5. Step 5: Solve for x
   x = 42,281,100.72/8,321.26
6. Step 6: Final answer
   x = 5,081.09