Finding the Third Proportional to 111,540 and 239,928

Step by Step Solution

1. Step 1: Write the proportion equation
   111,540 : 239,928 = 239,928 : x
2. Step 2: Convert to fraction form
   111,540/239,928 = 239,928/x
3. Step 3: Cross multiply
   111,540x = 239,928 × 239,928
4. Step 4: Simplify right side
   111,540x = 57,565,445,184
5. Step 5: Solve for x
   x = 57,565,445,184/111,540
6. Step 6: Final answer
   x = 516,096.87