Finding the Fourth Proportional to 25,436.16, 35,120.88 and 21,936.96

Step by Step Solution

1. Step 1: Write the proportion equation
   25,436.16 : 35,120.88 = 21,936.96 : x
2. Step 2: Convert to fraction form
   25,436.16/35,120.88 = 21,936.96/x
3. Step 3: Cross multiply
   25,436.16x = 35,120.88 × 21,936.96
4. Step 4: Simplify right side
   25,436.16x = 770,445,339.72
5. Step 5: Solve for x
   x = 770,445,339.72/25,436.16
6. Step 6: Final answer
   x = 30,289.37