Finding the Fourth Proportional to 8,086.23, 12,128.81 and 3,403.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,086.23 : 12,128.81 = 3,403.76 : x
2. Step 2: Convert to fraction form
   8,086.23/12,128.81 = 3,403.76/x
3. Step 3: Cross multiply
   8,086.23x = 12,128.81 × 3,403.76
4. Step 4: Simplify right side
   8,086.23x = 41,283,480.66
5. Step 5: Solve for x
   x = 41,283,480.66/8,086.23
6. Step 6: Final answer
   x = 5,105.41