Finding the Fourth Proportional to 8,667.56, 12,998.15 and 3,119.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.56 : 12,998.15 = 3,119.42 : x
2. Step 2: Convert to fraction form
   8,667.56/12,998.15 = 3,119.42/x
3. Step 3: Cross multiply
   8,667.56x = 12,998.15 × 3,119.42
4. Step 4: Simplify right side
   8,667.56x = 40,546,689.07
5. Step 5: Solve for x
   x = 40,546,689.07/8,667.56
6. Step 6: Final answer
   x = 4,677.98