Finding the Fourth Proportional to 20,316.27, 30,452.15 and 10,456.09

Step by Step Solution

1. Step 1: Write the proportion equation
   20,316.27 : 30,452.15 = 10,456.09 : x
2. Step 2: Convert to fraction form
   20,316.27/30,452.15 = 10,456.09/x
3. Step 3: Cross multiply
   20,316.27x = 30,452.15 × 10,456.09
4. Step 4: Simplify right side
   20,316.27x = 318,410,371.10
5. Step 5: Solve for x
   x = 318,410,371.10/20,316.27
6. Step 6: Final answer
   x = 15,672.68