Finding the Third Proportional to 228,856 and 478,638

Step by Step Solution

1. Step 1: Write the proportion equation
   228,856 : 478,638 = 478,638 : x
2. Step 2: Convert to fraction form
   228,856/478,638 = 478,638/x
3. Step 3: Cross multiply
   228,856x = 478,638 × 478,638
4. Step 4: Simplify right side
   228,856x = 229,094,335,044
5. Step 5: Solve for x
   x = 229,094,335,044/228,856
6. Step 6: Final answer
   x = 1,001,041.42