Finding the Fourth Proportional to 3,667.62, 5,061.27 and 1,989

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.62 : 5,061.27 = 1,989 : x
2. Step 2: Convert to fraction form
   3,667.62/5,061.27 = 1,989/x
3. Step 3: Cross multiply
   3,667.62x = 5,061.27 × 1,989
4. Step 4: Simplify right side
   3,667.62x = 10,066,866.03
5. Step 5: Solve for x
   x = 10,066,866.03/3,667.62
6. Step 6: Final answer
   x = 2,744.80