Finding the Fourth Proportional to 25,013.56, 34,517.42 and 13,680.85

Step by Step Solution

1. Step 1: Write the proportion equation
   25,013.56 : 34,517.42 = 13,680.85 : x
2. Step 2: Convert to fraction form
   25,013.56/34,517.42 = 13,680.85/x
3. Step 3: Cross multiply
   25,013.56x = 34,517.42 × 13,680.85
4. Step 4: Simplify right side
   25,013.56x = 472,227,683.69
5. Step 5: Solve for x
   x = 472,227,683.69/25,013.56
6. Step 6: Final answer
   x = 18,878.87