Finding the Fourth Proportional to 22,189.48, 30,621.22 and 12,757.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,189.48 : 30,621.22 = 12,757.32 : x
2. Step 2: Convert to fraction form
   22,189.48/30,621.22 = 12,757.32/x
3. Step 3: Cross multiply
   22,189.48x = 30,621.22 × 12,757.32
4. Step 4: Simplify right side
   22,189.48x = 390,644,702.33
5. Step 5: Solve for x
   x = 390,644,702.33/22,189.48
6. Step 6: Final answer
   x = 17,604.95