Finding the Fourth Proportional to 13,067.81, 19,590.78 and 9,107.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,067.81 : 19,590.78 = 9,107.45 : x
2. Step 2: Convert to fraction form
   13,067.81/19,590.78 = 9,107.45/x
3. Step 3: Cross multiply
   13,067.81x = 19,590.78 × 9,107.45
4. Step 4: Simplify right side
   13,067.81x = 178,422,117.94
5. Step 5: Solve for x
   x = 178,422,117.94/13,067.81
6. Step 6: Final answer
   x = 13,653.55