Finding the Third Proportional to 17,900 and 38,878

Step by Step Solution

1. Step 1: Write the proportion equation
   17,900 : 38,878 = 38,878 : x
2. Step 2: Convert to fraction form
   17,900/38,878 = 38,878/x
3. Step 3: Cross multiply
   17,900x = 38,878 × 38,878
4. Step 4: Simplify right side
   17,900x = 1,511,498,884
5. Step 5: Solve for x
   x = 1,511,498,884/17,900
6. Step 6: Final answer
   x = 84,441.28