Finding the Fourth Proportional to 20,585.60, 30,857.58 and 8,114.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,585.60 : 30,857.58 = 8,114.42 : x
2. Step 2: Convert to fraction form
   20,585.60/30,857.58 = 8,114.42/x
3. Step 3: Cross multiply
   20,585.60x = 30,857.58 × 8,114.42
4. Step 4: Simplify right side
   20,585.60x = 250,391,364.30
5. Step 5: Solve for x
   x = 250,391,364.30/20,585.60
6. Step 6: Final answer
   x = 12,163.42