Finding the Fourth Proportional to 8,667.10, 12,992.85 and 3,119.14

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.10 : 12,992.85 = 3,119.14 : x
2. Step 2: Convert to fraction form
   8,667.10/12,992.85 = 3,119.14/x
3. Step 3: Cross multiply
   8,667.10x = 12,992.85 × 3,119.14
4. Step 4: Simplify right side
   8,667.10x = 40,526,518.15
5. Step 5: Solve for x
   x = 40,526,518.15/8,667.10
6. Step 6: Final answer
   x = 4,675.90