Finding the Fourth Proportional to 20,608.56, 30,836.25 and 12,293.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,608.56 : 30,836.25 = 12,293.10 : x
2. Step 2: Convert to fraction form
   20,608.56/30,836.25 = 12,293.10/x
3. Step 3: Cross multiply
   20,608.56x = 30,836.25 × 12,293.10
4. Step 4: Simplify right side
   20,608.56x = 379,073,104.88
5. Step 5: Solve for x
   x = 379,073,104.88/20,608.56
6. Step 6: Final answer
   x = 18,393.96