Finding the Third Proportional to 111,162 and 239,820

Step by Step Solution

1. Step 1: Write the proportion equation
   111,162 : 239,820 = 239,820 : x
2. Step 2: Convert to fraction form
   111,162/239,820 = 239,820/x
3. Step 3: Cross multiply
   111,162x = 239,820 × 239,820
4. Step 4: Simplify right side
   111,162x = 57,513,632,400
5. Step 5: Solve for x
   x = 57,513,632,400/111,162
6. Step 6: Final answer
   x = 517,385.73