Finding the Third Proportional to 218,876 and 479,276

Step by Step Solution

1. Step 1: Write the proportion equation
   218,876 : 479,276 = 479,276 : x
2. Step 2: Convert to fraction form
   218,876/479,276 = 479,276/x
3. Step 3: Cross multiply
   218,876x = 479,276 × 479,276
4. Step 4: Simplify right side
   218,876x = 229,705,484,176
5. Step 5: Solve for x
   x = 229,705,484,176/218,876
6. Step 6: Final answer
   x = 1,049,477.71