Finding the Fourth Proportional to 3,778.52, 5,208.57 and 2,656.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,778.52 : 5,208.57 = 2,656.40 : x
2. Step 2: Convert to fraction form
   3,778.52/5,208.57 = 2,656.40/x
3. Step 3: Cross multiply
   3,778.52x = 5,208.57 × 2,656.40
4. Step 4: Simplify right side
   3,778.52x = 13,836,019.31
5. Step 5: Solve for x
   x = 13,836,019.31/3,778.52
6. Step 6: Final answer
   x = 3,661.76