Finding the Fourth Proportional to 3,665.31, 5,058.09 and 1,986.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.31 : 5,058.09 = 1,986.67 : x
2. Step 2: Convert to fraction form
   3,665.31/5,058.09 = 1,986.67/x
3. Step 3: Cross multiply
   3,665.31x = 5,058.09 × 1,986.67
4. Step 4: Simplify right side
   3,665.31x = 10,048,755.66
5. Step 5: Solve for x
   x = 10,048,755.66/3,665.31
6. Step 6: Final answer
   x = 2,741.58