Finding the Fourth Proportional to 3,205.78, 4,425.98 and 2,458.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,205.78 : 4,425.98 = 2,458.30 : x
2. Step 2: Convert to fraction form
   3,205.78/4,425.98 = 2,458.30/x
3. Step 3: Cross multiply
   3,205.78x = 4,425.98 × 2,458.30
4. Step 4: Simplify right side
   3,205.78x = 10,880,386.63
5. Step 5: Solve for x
   x = 10,880,386.63/3,205.78
6. Step 6: Final answer
   x = 3,393.99