Finding the Fourth Proportional to 3,665.75, 5,058.69 and 1,987.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.75 : 5,058.69 = 1,987.16 : x
2. Step 2: Convert to fraction form
   3,665.75/5,058.69 = 1,987.16/x
3. Step 3: Cross multiply
   3,665.75x = 5,058.69 × 1,987.16
4. Step 4: Simplify right side
   3,665.75x = 10,052,426.42
5. Step 5: Solve for x
   x = 10,052,426.42/3,665.75
6. Step 6: Final answer
   x = 2,742.26