Finding the Third Proportional to 356,580 and 743,040

Step by Step Solution

1. Step 1: Write the proportion equation
   356,580 : 743,040 = 743,040 : x
2. Step 2: Convert to fraction form
   356,580/743,040 = 743,040/x
3. Step 3: Cross multiply
   356,580x = 743,040 × 743,040
4. Step 4: Simplify right side
   356,580x = 552,108,441,600
5. Step 5: Solve for x
   x = 552,108,441,600/356,580
6. Step 6: Final answer
   x = 1,548,343.83