Finding the Fourth Proportional to 3,667.81, 5,061.55 and 1,989.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.81 : 5,061.55 = 1,989.18 : x
2. Step 2: Convert to fraction form
   3,667.81/5,061.55 = 1,989.18/x
3. Step 3: Cross multiply
   3,667.81x = 5,061.55 × 1,989.18
4. Step 4: Simplify right side
   3,667.81x = 10,068,334.03
5. Step 5: Solve for x
   x = 10,068,334.03/3,667.81
6. Step 6: Final answer
   x = 2,745.05