Finding the Third Proportional to 109,200 and 238,920

Step by Step Solution

1. Step 1: Write the proportion equation
   109,200 : 238,920 = 238,920 : x
2. Step 2: Convert to fraction form
   109,200/238,920 = 238,920/x
3. Step 3: Cross multiply
   109,200x = 238,920 × 238,920
4. Step 4: Simplify right side
   109,200x = 57,082,766,400
5. Step 5: Solve for x
   x = 57,082,766,400/109,200
6. Step 6: Final answer
   x = 522,735.96