Finding the Third Proportional to 436,806 and 658,290

Step by Step Solution

1. Step 1: Write the proportion equation
   436,806 : 658,290 = 658,290 : x
2. Step 2: Convert to fraction form
   436,806/658,290 = 658,290/x
3. Step 3: Cross multiply
   436,806x = 658,290 × 658,290
4. Step 4: Simplify right side
   436,806x = 433,345,724,100
5. Step 5: Solve for x
   x = 433,345,724,100/436,806
6. Step 6: Final answer
   x = 992,078.23