Finding the Fourth Proportional to 8,111.46, 12,162.28 and 3,947.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.46 : 12,162.28 = 3,947.28 : x
2. Step 2: Convert to fraction form
   8,111.46/12,162.28 = 3,947.28/x
3. Step 3: Cross multiply
   8,111.46x = 12,162.28 × 3,947.28
4. Step 4: Simplify right side
   8,111.46x = 48,007,924.60
5. Step 5: Solve for x
   x = 48,007,924.60/8,111.46
6. Step 6: Final answer
   x = 5,918.53