Finding the Fourth Proportional to 16,521.72, 24,759.27 and 12,806.52

Step by Step Solution

1. Step 1: Write the proportion equation
   16,521.72 : 24,759.27 = 12,806.52 : x
2. Step 2: Convert to fraction form
   16,521.72/24,759.27 = 12,806.52/x
3. Step 3: Cross multiply
   16,521.72x = 24,759.27 × 12,806.52
4. Step 4: Simplify right side
   16,521.72x = 317,080,086.44
5. Step 5: Solve for x
   x = 317,080,086.44/16,521.72
6. Step 6: Final answer
   x = 19,191.71