Finding the Fourth Proportional to 22,128.67, 30,567.41 and 20,554.03

Step by Step Solution

1. Step 1: Write the proportion equation
   22,128.67 : 30,567.41 = 20,554.03 : x
2. Step 2: Convert to fraction form
   22,128.67/30,567.41 = 20,554.03/x
3. Step 3: Cross multiply
   22,128.67x = 30,567.41 × 20,554.03
4. Step 4: Simplify right side
   22,128.67x = 628,283,462.16
5. Step 5: Solve for x
   x = 628,283,462.16/22,128.67
6. Step 6: Final answer
   x = 28,392.28