Finding the Third Proportional to 111,143 and 239,662

Step by Step Solution

1. Step 1: Write the proportion equation
   111,143 : 239,662 = 239,662 : x
2. Step 2: Convert to fraction form
   111,143/239,662 = 239,662/x
3. Step 3: Cross multiply
   111,143x = 239,662 × 239,662
4. Step 4: Simplify right side
   111,143x = 57,437,874,244
5. Step 5: Solve for x
   x = 57,437,874,244/111,143
6. Step 6: Final answer
   x = 516,792.55