Finding the Fourth Proportional to 3,970.82, 5,480.10 and 2,398.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.82 : 5,480.10 = 2,398.88 : x
2. Step 2: Convert to fraction form
   3,970.82/5,480.10 = 2,398.88/x
3. Step 3: Cross multiply
   3,970.82x = 5,480.10 × 2,398.88
4. Step 4: Simplify right side
   3,970.82x = 13,146,074.89
5. Step 5: Solve for x
   x = 13,146,074.89/3,970.82
6. Step 6: Final answer
   x = 3,310.67