Finding the Fourth Proportional to 3,968.38, 5,478.86 and 2,554.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968.38 : 5,478.86 = 2,554.53 : x
2. Step 2: Convert to fraction form
   3,968.38/5,478.86 = 2,554.53/x
3. Step 3: Cross multiply
   3,968.38x = 5,478.86 × 2,554.53
4. Step 4: Simplify right side
   3,968.38x = 13,995,872.07
5. Step 5: Solve for x
   x = 13,995,872.07/3,968.38
6. Step 6: Final answer
   x = 3,526.85