Finding the Fourth Proportional to 8,085.15, 12,131.91 and 4,189.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.15 : 12,131.91 = 4,189.59 : x
2. Step 2: Convert to fraction form
   8,085.15/12,131.91 = 4,189.59/x
3. Step 3: Cross multiply
   8,085.15x = 12,131.91 × 4,189.59
4. Step 4: Simplify right side
   8,085.15x = 50,827,728.82
5. Step 5: Solve for x
   x = 50,827,728.82/8,085.15
6. Step 6: Final answer
   x = 6,286.55