Finding the Third Proportional to 112,638 and 238,218

Step by Step Solution

1. Step 1: Write the proportion equation
   112,638 : 238,218 = 238,218 : x
2. Step 2: Convert to fraction form
   112,638/238,218 = 238,218/x
3. Step 3: Cross multiply
   112,638x = 238,218 × 238,218
4. Step 4: Simplify right side
   112,638x = 56,747,815,524
5. Step 5: Solve for x
   x = 56,747,815,524/112,638
6. Step 6: Final answer
   x = 503,807.02