Finding the Fourth Proportional to 8,321.69, 12,482.49 and 2,478.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,321.69 : 12,482.49 = 2,478.30 : x
2. Step 2: Convert to fraction form
   8,321.69/12,482.49 = 2,478.30/x
3. Step 3: Cross multiply
   8,321.69x = 12,482.49 × 2,478.30
4. Step 4: Simplify right side
   8,321.69x = 30,935,354.97
5. Step 5: Solve for x
   x = 30,935,354.97/8,321.69
6. Step 6: Final answer
   x = 3,717.44