Finding the Third Proportional to 389,700 and 584,556

Step by Step Solution

1. Step 1: Write the proportion equation
   389,700 : 584,556 = 584,556 : x
2. Step 2: Convert to fraction form
   389,700/584,556 = 584,556/x
3. Step 3: Cross multiply
   389,700x = 584,556 × 584,556
4. Step 4: Simplify right side
   389,700x = 341,705,717,136
5. Step 5: Solve for x
   x = 341,705,717,136/389,700
6. Step 6: Final answer
   x = 876,843.00