Finding the Third Proportional to 109,830.50 and 239,800

Step by Step Solution

1. Step 1: Write the proportion equation
   109,830.50 : 239,800 = 239,800 : x
2. Step 2: Convert to fraction form
   109,830.50/239,800 = 239,800/x
3. Step 3: Cross multiply
   109,830.50x = 239,800 × 239,800
4. Step 4: Simplify right side
   109,830.50x = 57,504,040,000
5. Step 5: Solve for x
   x = 57,504,040,000/109,830.50
6. Step 6: Final answer
   x = 523,570.77