Finding the Fourth Proportional to 15,917.49, 21,966.59 and 9,112.73

Step by Step Solution

1. Step 1: Write the proportion equation
   15,917.49 : 21,966.59 = 9,112.73 : x
2. Step 2: Convert to fraction form
   15,917.49/21,966.59 = 9,112.73/x
3. Step 3: Cross multiply
   15,917.49x = 21,966.59 × 9,112.73
4. Step 4: Simplify right side
   15,917.49x = 200,175,578.42
5. Step 5: Solve for x
   x = 200,175,578.42/15,917.49
6. Step 6: Final answer
   x = 12,575.83