Finding the Fourth Proportional to 25,019.91, 34,487.78 and 19,706.31

Step by Step Solution

1. Step 1: Write the proportion equation
   25,019.91 : 34,487.78 = 19,706.31 : x
2. Step 2: Convert to fraction form
   25,019.91/34,487.78 = 19,706.31/x
3. Step 3: Cross multiply
   25,019.91x = 34,487.78 × 19,706.31
4. Step 4: Simplify right side
   25,019.91x = 679,626,785.36
5. Step 5: Solve for x
   x = 679,626,785.36/25,019.91
6. Step 6: Final answer
   x = 27,163.44