Finding the Fourth Proportional to 23,580, 32,540.40 and 13,644

Step by Step Solution

1. Step 1: Write the proportion equation
   23,580 : 32,540.40 = 13,644 : x
2. Step 2: Convert to fraction form
   23,580/32,540.40 = 13,644/x
3. Step 3: Cross multiply
   23,580x = 32,540.40 × 13,644
4. Step 4: Simplify right side
   23,580x = 443,981,217.60
5. Step 5: Solve for x
   x = 443,981,217.60/23,580
6. Step 6: Final answer
   x = 18,828.72