Finding the Fourth Proportional to 25,300.26, 34,928.31 and 15,231.15

Step by Step Solution

1. Step 1: Write the proportion equation
   25,300.26 : 34,928.31 = 15,231.15 : x
2. Step 2: Convert to fraction form
   25,300.26/34,928.31 = 15,231.15/x
3. Step 3: Cross multiply
   25,300.26x = 34,928.31 × 15,231.15
4. Step 4: Simplify right side
   25,300.26x = 531,998,328.86
5. Step 5: Solve for x
   x = 531,998,328.86/25,300.26
6. Step 6: Final answer
   x = 21,027.39