Finding the Fourth Proportional to 8,131.15, 12,189.43 and 2,935.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.15 : 12,189.43 = 2,935.81 : x
2. Step 2: Convert to fraction form
   8,131.15/12,189.43 = 2,935.81/x
3. Step 3: Cross multiply
   8,131.15x = 12,189.43 × 2,935.81
4. Step 4: Simplify right side
   8,131.15x = 35,785,774.86
5. Step 5: Solve for x
   x = 35,785,774.86/8,131.15
6. Step 6: Final answer
   x = 4,401.07