Finding the Fourth Proportional to 15,882.41, 21,918.72 and 9,169.26

Step by Step Solution

1. Step 1: Write the proportion equation
   15,882.41 : 21,918.72 = 9,169.26 : x
2. Step 2: Convert to fraction form
   15,882.41/21,918.72 = 9,169.26/x
3. Step 3: Cross multiply
   15,882.41x = 21,918.72 × 9,169.26
4. Step 4: Simplify right side
   15,882.41x = 200,978,442.55
5. Step 5: Solve for x
   x = 200,978,442.55/15,882.41
6. Step 6: Final answer
   x = 12,654.15