Finding the Fourth Proportional to 25,644, 35,388.72 and 13,868

Step by Step Solution

1. Step 1: Write the proportion equation
   25,644 : 35,388.72 = 13,868 : x
2. Step 2: Convert to fraction form
   25,644/35,388.72 = 13,868/x
3. Step 3: Cross multiply
   25,644x = 35,388.72 × 13,868
4. Step 4: Simplify right side
   25,644x = 490,770,768.96
5. Step 5: Solve for x
   x = 490,770,768.96/25,644
6. Step 6: Final answer
   x = 19,137.84