Finding the Fourth Proportional to 5,629.57, 7,768.19 and 3,111.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,629.57 : 7,768.19 = 3,111.55 : x
2. Step 2: Convert to fraction form
   5,629.57/7,768.19 = 3,111.55/x
3. Step 3: Cross multiply
   5,629.57x = 7,768.19 × 3,111.55
4. Step 4: Simplify right side
   5,629.57x = 24,171,111.59
5. Step 5: Solve for x
   x = 24,171,111.59/5,629.57
6. Step 6: Final answer
   x = 4,293.60