Finding the Fourth Proportional to 25,456.54, 38,199.69 and 10,664.20

Step by Step Solution

1. Step 1: Write the proportion equation
   25,456.54 : 38,199.69 = 10,664.20 : x
2. Step 2: Convert to fraction form
   25,456.54/38,199.69 = 10,664.20/x
3. Step 3: Cross multiply
   25,456.54x = 38,199.69 × 10,664.20
4. Step 4: Simplify right side
   25,456.54x = 407,369,134.10
5. Step 5: Solve for x
   x = 407,369,134.10/25,456.54
6. Step 6: Final answer
   x = 16,002.53