Finding the Fourth Proportional to 25,617.27, 38,431.37 and 8,978.32

Step by Step Solution

1. Step 1: Write the proportion equation
   25,617.27 : 38,431.37 = 8,978.32 : x
2. Step 2: Convert to fraction form
   25,617.27/38,431.37 = 8,978.32/x
3. Step 3: Cross multiply
   25,617.27x = 38,431.37 × 8,978.32
4. Step 4: Simplify right side
   25,617.27x = 345,049,064.27
5. Step 5: Solve for x
   x = 345,049,064.27/25,617.27
6. Step 6: Final answer
   x = 13,469.39