Finding the Fourth Proportional to 20,452.50, 28,231.74 and 12,069

Step by Step Solution

1. Step 1: Write the proportion equation
   20,452.50 : 28,231.74 = 12,069 : x
2. Step 2: Convert to fraction form
   20,452.50/28,231.74 = 12,069/x
3. Step 3: Cross multiply
   20,452.50x = 28,231.74 × 12,069
4. Step 4: Simplify right side
   20,452.50x = 340,728,870.06
5. Step 5: Solve for x
   x = 340,728,870.06/20,452.50
6. Step 6: Final answer
   x = 16,659.52