Finding the Fourth Proportional to 3,870.78, 5,342.52 and 2,544.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.78 : 5,342.52 = 2,544.60 : x
2. Step 2: Convert to fraction form
   3,870.78/5,342.52 = 2,544.60/x
3. Step 3: Cross multiply
   3,870.78x = 5,342.52 × 2,544.60
4. Step 4: Simplify right side
   3,870.78x = 13,594,576.39
5. Step 5: Solve for x
   x = 13,594,576.39/3,870.78
6. Step 6: Final answer
   x = 3,512.10