Finding the Fourth Proportional to 3,986.37, 5,980.62 and 3,550.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.37 : 5,980.62 = 3,550.61 : x
2. Step 2: Convert to fraction form
   3,986.37/5,980.62 = 3,550.61/x
3. Step 3: Cross multiply
   3,986.37x = 5,980.62 × 3,550.61
4. Step 4: Simplify right side
   3,986.37x = 21,234,849.18
5. Step 5: Solve for x
   x = 21,234,849.18/3,986.37
6. Step 6: Final answer
   x = 5,326.86