Finding the Third Proportional to 288,444 and 447,789

Step by Step Solution

1. Step 1: Write the proportion equation
   288,444 : 447,789 = 447,789 : x
2. Step 2: Convert to fraction form
   288,444/447,789 = 447,789/x
3. Step 3: Cross multiply
   288,444x = 447,789 × 447,789
4. Step 4: Simplify right side
   288,444x = 200,514,988,521
5. Step 5: Solve for x
   x = 200,514,988,521/288,444
6. Step 6: Final answer
   x = 695,160.89