Finding the Fourth Proportional to 8,111.81, 11,194.31 and 4,385.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.81 : 11,194.31 = 4,385.81 : x
2. Step 2: Convert to fraction form
   8,111.81/11,194.31 = 4,385.81/x
3. Step 3: Cross multiply
   8,111.81x = 11,194.31 × 4,385.81
4. Step 4: Simplify right side
   8,111.81x = 49,096,155.69
5. Step 5: Solve for x
   x = 49,096,155.69/8,111.81
6. Step 6: Final answer
   x = 6,052.43