Finding the Fourth Proportional to 22,128.20, 30,522.96 and 13,169.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,128.20 : 30,522.96 = 13,169.01 : x
2. Step 2: Convert to fraction form
   22,128.20/30,522.96 = 13,169.01/x
3. Step 3: Cross multiply
   22,128.20x = 30,522.96 × 13,169.01
4. Step 4: Simplify right side
   22,128.20x = 401,957,165.47
5. Step 5: Solve for x
   x = 401,957,165.47/22,128.20
6. Step 6: Final answer
   x = 18,164.93