Finding the Fourth Proportional to 12,736.29, 19,067.49 and 8,289.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,736.29 : 19,067.49 = 8,289.12 : x
2. Step 2: Convert to fraction form
   12,736.29/19,067.49 = 8,289.12/x
3. Step 3: Cross multiply
   12,736.29x = 19,067.49 × 8,289.12
4. Step 4: Simplify right side
   12,736.29x = 158,052,712.71
5. Step 5: Solve for x
   x = 158,052,712.71/12,736.29
6. Step 6: Final answer
   x = 12,409.64