Finding the Fourth Proportional to 8,069.15, 12,104.46 and 3,139.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,069.15 : 12,104.46 = 3,139.16 : x
2. Step 2: Convert to fraction form
   8,069.15/12,104.46 = 3,139.16/x
3. Step 3: Cross multiply
   8,069.15x = 12,104.46 × 3,139.16
4. Step 4: Simplify right side
   8,069.15x = 37,997,776.13
5. Step 5: Solve for x
   x = 37,997,776.13/8,069.15
6. Step 6: Final answer
   x = 4,709.02