Finding the Fourth Proportional to 22,105.20, 33,109.20 and 19,189.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,105.20 : 33,109.20 = 19,189.20 : x
2. Step 2: Convert to fraction form
   22,105.20/33,109.20 = 19,189.20/x
3. Step 3: Cross multiply
   22,105.20x = 33,109.20 × 19,189.20
4. Step 4: Simplify right side
   22,105.20x = 635,339,060.64
5. Step 5: Solve for x
   x = 635,339,060.64/22,105.20
6. Step 6: Final answer
   x = 28,741.61