Finding the Fourth Proportional to 3,745.80, 5,131.73 and 3,605.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,745.80 : 5,131.73 = 3,605.60 : x
2. Step 2: Convert to fraction form
   3,745.80/5,131.73 = 3,605.60/x
3. Step 3: Cross multiply
   3,745.80x = 5,131.73 × 3,605.60
4. Step 4: Simplify right side
   3,745.80x = 18,502,965.69
5. Step 5: Solve for x
   x = 18,502,965.69/3,745.80
6. Step 6: Final answer
   x = 4,939.66