Finding the Third Proportional to 111,117 and 239,608.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,117 : 239,608.50 = 239,608.50 : x
2. Step 2: Convert to fraction form
   111,117/239,608.50 = 239,608.50/x
3. Step 3: Cross multiply
   111,117x = 239,608.50 × 239,608.50
4. Step 4: Simplify right side
   111,117x = 57,412,233,272.25
5. Step 5: Solve for x
   x = 57,412,233,272.25/111,117
6. Step 6: Final answer
   x = 516,682.72