Finding the Fourth Proportional to 3,968.10, 5,478.54 and 2,552.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968.10 : 5,478.54 = 2,552.42 : x
2. Step 2: Convert to fraction form
   3,968.10/5,478.54 = 2,552.42/x
3. Step 3: Cross multiply
   3,968.10x = 5,478.54 × 2,552.42
4. Step 4: Simplify right side
   3,968.10x = 13,983,535.07
5. Step 5: Solve for x
   x = 13,983,535.07/3,968.10
6. Step 6: Final answer
   x = 3,523.99