Finding the Fourth Proportional to 25,059.06, 34,581.55 and 13,728.31

Step by Step Solution

1. Step 1: Write the proportion equation
   25,059.06 : 34,581.55 = 13,728.31 : x
2. Step 2: Convert to fraction form
   25,059.06/34,581.55 = 13,728.31/x
3. Step 3: Cross multiply
   25,059.06x = 34,581.55 × 13,728.31
4. Step 4: Simplify right side
   25,059.06x = 474,746,238.68
5. Step 5: Solve for x
   x = 474,746,238.68/25,059.06
6. Step 6: Final answer
   x = 18,945.09