Finding the Fourth Proportional to 2,678.40, 3,989.52 and 2,552.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.40 : 3,989.52 = 2,552.04 : x
2. Step 2: Convert to fraction form
   2,678.40/3,989.52 = 2,552.04/x
3. Step 3: Cross multiply
   2,678.40x = 3,989.52 × 2,552.04
4. Step 4: Simplify right side
   2,678.40x = 10,181,414.62
5. Step 5: Solve for x
   x = 10,181,414.62/2,678.40
6. Step 6: Final answer
   x = 3,801.30