Finding the Fourth Proportional to 3,761.94, 5,640.45 and 3,555.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,761.94 : 5,640.45 = 3,555.42 : x
2. Step 2: Convert to fraction form
   3,761.94/5,640.45 = 3,555.42/x
3. Step 3: Cross multiply
   3,761.94x = 5,640.45 × 3,555.42
4. Step 4: Simplify right side
   3,761.94x = 20,054,168.74
5. Step 5: Solve for x
   x = 20,054,168.74/3,761.94
6. Step 6: Final answer
   x = 5,330.81