Finding the Third Proportional to 439,788 and 658,530

Step by Step Solution

1. Step 1: Write the proportion equation
   439,788 : 658,530 = 658,530 : x
2. Step 2: Convert to fraction form
   439,788/658,530 = 658,530/x
3. Step 3: Cross multiply
   439,788x = 658,530 × 658,530
4. Step 4: Simplify right side
   439,788x = 433,661,760,900
5. Step 5: Solve for x
   x = 433,661,760,900/439,788
6. Step 6: Final answer
   x = 986,070.02