Finding the Third Proportional to 219,688 and 479,648

Step by Step Solution

1. Step 1: Write the proportion equation
   219,688 : 479,648 = 479,648 : x
2. Step 2: Convert to fraction form
   219,688/479,648 = 479,648/x
3. Step 3: Cross multiply
   219,688x = 479,648 × 479,648
4. Step 4: Simplify right side
   219,688x = 230,062,203,904
5. Step 5: Solve for x
   x = 230,062,203,904/219,688
6. Step 6: Final answer
   x = 1,047,222.44