Finding the Fourth Proportional to 25,009.98, 34,513.78 and 13,679.28

Step by Step Solution

1. Step 1: Write the proportion equation
   25,009.98 : 34,513.78 = 13,679.28 : x
2. Step 2: Convert to fraction form
   25,009.98/34,513.78 = 13,679.28/x
3. Step 3: Cross multiply
   25,009.98x = 34,513.78 × 13,679.28
4. Step 4: Simplify right side
   25,009.98x = 472,123,660.48
5. Step 5: Solve for x
   x = 472,123,660.48/25,009.98
6. Step 6: Final answer
   x = 18,877.41