Finding the Fourth Proportional to 18,086.64, 24,984.72 and 13,644.60

Step by Step Solution

1. Step 1: Write the proportion equation
   18,086.64 : 24,984.72 = 13,644.60 : x
2. Step 2: Convert to fraction form
   18,086.64/24,984.72 = 13,644.60/x
3. Step 3: Cross multiply
   18,086.64x = 24,984.72 × 13,644.60
4. Step 4: Simplify right side
   18,086.64x = 340,906,510.51
5. Step 5: Solve for x
   x = 340,906,510.51/18,086.64
6. Step 6: Final answer
   x = 18,848.53