Finding the Fourth Proportional to 3,665.38, 5,058.23 and 1,986.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.38 : 5,058.23 = 1,986.79 : x
2. Step 2: Convert to fraction form
   3,665.38/5,058.23 = 1,986.79/x
3. Step 3: Cross multiply
   3,665.38x = 5,058.23 × 1,986.79
4. Step 4: Simplify right side
   3,665.38x = 10,049,640.78
5. Step 5: Solve for x
   x = 10,049,640.78/3,665.38
6. Step 6: Final answer
   x = 2,741.77