Finding the Third Proportional to 356,610 and 743,109

Step by Step Solution

1. Step 1: Write the proportion equation
   356,610 : 743,109 = 743,109 : x
2. Step 2: Convert to fraction form
   356,610/743,109 = 743,109/x
3. Step 3: Cross multiply
   356,610x = 743,109 × 743,109
4. Step 4: Simplify right side
   356,610x = 552,210,985,881
5. Step 5: Solve for x
   x = 552,210,985,881/356,610
6. Step 6: Final answer
   x = 1,548,501.12