Finding the Fourth Proportional to 20,456.55, 30,514.86 and 20,118.24

Step by Step Solution

1. Step 1: Write the proportion equation
   20,456.55 : 30,514.86 = 20,118.24 : x
2. Step 2: Convert to fraction form
   20,456.55/30,514.86 = 20,118.24/x
3. Step 3: Cross multiply
   20,456.55x = 30,514.86 × 20,118.24
4. Step 4: Simplify right side
   20,456.55x = 613,905,277.05
5. Step 5: Solve for x
   x = 613,905,277.05/20,456.55
6. Step 6: Final answer
   x = 30,010.21