Finding the Fourth Proportional to 25,209.89, 34,789.37 and 13,879.15

Step by Step Solution

1. Step 1: Write the proportion equation
   25,209.89 : 34,789.37 = 13,879.15 : x
2. Step 2: Convert to fraction form
   25,209.89/34,789.37 = 13,879.15/x
3. Step 3: Cross multiply
   25,209.89x = 34,789.37 × 13,879.15
4. Step 4: Simplify right side
   25,209.89x = 482,846,815.24
5. Step 5: Solve for x
   x = 482,846,815.24/25,209.89
6. Step 6: Final answer
   x = 19,153.07