Finding the Third Proportional to 338,881 and 451,789

Step by Step Solution

1. Step 1: Write the proportion equation
   338,881 : 451,789 = 451,789 : x
2. Step 2: Convert to fraction form
   338,881/451,789 = 451,789/x
3. Step 3: Cross multiply
   338,881x = 451,789 × 451,789
4. Step 4: Simplify right side
   338,881x = 204,113,300,521
5. Step 5: Solve for x
   x = 204,113,300,521/338,881
6. Step 6: Final answer
   x = 602,315.56