Finding the Fourth Proportional to 22,164.22, 30,590.58 and 13,212.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,164.22 : 30,590.58 = 13,212.30 : x
2. Step 2: Convert to fraction form
   22,164.22/30,590.58 = 13,212.30/x
3. Step 3: Cross multiply
   22,164.22x = 30,590.58 × 13,212.30
4. Step 4: Simplify right side
   22,164.22x = 404,171,920.13
5. Step 5: Solve for x
   x = 404,171,920.13/22,164.22
6. Step 6: Final answer
   x = 18,235.33