Finding the Fourth Proportional to 13,644.92, 18,784.50 and 13,017.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,644.92 : 18,784.50 = 13,017.98 : x
2. Step 2: Convert to fraction form
   13,644.92/18,784.50 = 13,017.98/x
3. Step 3: Cross multiply
   13,644.92x = 18,784.50 × 13,017.98
4. Step 4: Simplify right side
   13,644.92x = 244,536,245.31
5. Step 5: Solve for x
   x = 244,536,245.31/13,644.92
6. Step 6: Final answer
   x = 17,921.41