Finding the Fourth Proportional to 13,734.78, 18,947.61 and 8,067.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,734.78 : 18,947.61 = 8,067.69 : x
2. Step 2: Convert to fraction form
   13,734.78/18,947.61 = 8,067.69/x
3. Step 3: Cross multiply
   13,734.78x = 18,947.61 × 8,067.69
4. Step 4: Simplify right side
   13,734.78x = 152,863,443.72
5. Step 5: Solve for x
   x = 152,863,443.72/13,734.78
6. Step 6: Final answer
   x = 11,129.66