Finding the Fourth Proportional to 12,928.82, 19,399.15 and 7,674.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928.82 : 19,399.15 = 7,674.24 : x
2. Step 2: Convert to fraction form
   12,928.82/19,399.15 = 7,674.24/x
3. Step 3: Cross multiply
   12,928.82x = 19,399.15 × 7,674.24
4. Step 4: Simplify right side
   12,928.82x = 148,873,772.07
5. Step 5: Solve for x
   x = 148,873,772.07/12,928.82
6. Step 6: Final answer
   x = 11,514.88