Finding the Third Proportional to 111,117.75 and 239,610

Step by Step Solution

1. Step 1: Write the proportion equation
   111,117.75 : 239,610 = 239,610 : x
2. Step 2: Convert to fraction form
   111,117.75/239,610 = 239,610/x
3. Step 3: Cross multiply
   111,117.75x = 239,610 × 239,610
4. Step 4: Simplify right side
   111,117.75x = 57,412,952,100
5. Step 5: Solve for x
   x = 57,412,952,100/111,117.75
6. Step 6: Final answer
   x = 516,685.70