Finding the Fourth Proportional to 25,287.31, 34,896.42 and 13,956.79

Step by Step Solution

1. Step 1: Write the proportion equation
   25,287.31 : 34,896.42 = 13,956.79 : x
2. Step 2: Convert to fraction form
   25,287.31/34,896.42 = 13,956.79/x
3. Step 3: Cross multiply
   25,287.31x = 34,896.42 × 13,956.79
4. Step 4: Simplify right side
   25,287.31x = 487,042,005.69
5. Step 5: Solve for x
   x = 487,042,005.69/25,287.31
6. Step 6: Final answer
   x = 19,260.33