Finding the Fourth Proportional to 3,665.30, 5,058.12 and 1,986.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.30 : 5,058.12 = 1,986.70 : x
2. Step 2: Convert to fraction form
   3,665.30/5,058.12 = 1,986.70/x
3. Step 3: Cross multiply
   3,665.30x = 5,058.12 × 1,986.70
4. Step 4: Simplify right side
   3,665.30x = 10,048,931.78
5. Step 5: Solve for x
   x = 10,048,931.78/3,665.30
6. Step 6: Final answer
   x = 2,741.64