Finding the Third Proportional to 388,904 and 588,789

Step by Step Solution

1. Step 1: Write the proportion equation
   388,904 : 588,789 = 588,789 : x
2. Step 2: Convert to fraction form
   388,904/588,789 = 588,789/x
3. Step 3: Cross multiply
   388,904x = 588,789 × 588,789
4. Step 4: Simplify right side
   388,904x = 346,672,486,521
5. Step 5: Solve for x
   x = 346,672,486,521/388,904
6. Step 6: Final answer
   x = 891,408.90