Finding the Third Proportional to 25,399 and 54,578

Step by Step Solution

1. Step 1: Write the proportion equation
   25,399 : 54,578 = 54,578 : x
2. Step 2: Convert to fraction form
   25,399/54,578 = 54,578/x
3. Step 3: Cross multiply
   25,399x = 54,578 × 54,578
4. Step 4: Simplify right side
   25,399x = 2,978,758,084
5. Step 5: Solve for x
   x = 2,978,758,084/25,399
6. Step 6: Final answer
   x = 117,278.56