Finding the Fourth Proportional to 20,162.79, 30,250.34 and 10,308.99

Step by Step Solution

1. Step 1: Write the proportion equation
   20,162.79 : 30,250.34 = 10,308.99 : x
2. Step 2: Convert to fraction form
   20,162.79/30,250.34 = 10,308.99/x
3. Step 3: Cross multiply
   20,162.79x = 30,250.34 × 10,308.99
4. Step 4: Simplify right side
   20,162.79x = 311,850,452.56
5. Step 5: Solve for x
   x = 311,850,452.56/20,162.79
6. Step 6: Final answer
   x = 15,466.63