Finding the Fourth Proportional to 8,667.89, 12,991.03 and 3,982.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.89 : 12,991.03 = 3,982.92 : x
2. Step 2: Convert to fraction form
   8,667.89/12,991.03 = 3,982.92/x
3. Step 3: Cross multiply
   8,667.89x = 12,991.03 × 3,982.92
4. Step 4: Simplify right side
   8,667.89x = 51,742,233.21
5. Step 5: Solve for x
   x = 51,742,233.21/8,667.89
6. Step 6: Final answer
   x = 5,969.42