Finding the Fourth Proportional to 22,128.82, 30,523.81 and 13,169.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,128.82 : 30,523.81 = 13,169.64 : x
2. Step 2: Convert to fraction form
   22,128.82/30,523.81 = 13,169.64/x
3. Step 3: Cross multiply
   22,128.82x = 30,523.81 × 13,169.64
4. Step 4: Simplify right side
   22,128.82x = 401,987,589.13
5. Step 5: Solve for x
   x = 401,987,589.13/22,128.82
6. Step 6: Final answer
   x = 18,165.79