Finding the Fourth Proportional to 20,662.52, 28,514.37 and 12,165

Step by Step Solution

1. Step 1: Write the proportion equation
   20,662.52 : 28,514.37 = 12,165 : x
2. Step 2: Convert to fraction form
   20,662.52/28,514.37 = 12,165/x
3. Step 3: Cross multiply
   20,662.52x = 28,514.37 × 12,165
4. Step 4: Simplify right side
   20,662.52x = 346,877,311.05
5. Step 5: Solve for x
   x = 346,877,311.05/20,662.52
6. Step 6: Final answer
   x = 16,787.76