Finding the Third Proportional to 339,008 and 743,140

Step by Step Solution

1. Step 1: Write the proportion equation
   339,008 : 743,140 = 743,140 : x
2. Step 2: Convert to fraction form
   339,008/743,140 = 743,140/x
3. Step 3: Cross multiply
   339,008x = 743,140 × 743,140
4. Step 4: Simplify right side
   339,008x = 552,257,059,600
5. Step 5: Solve for x
   x = 552,257,059,600/339,008
6. Step 6: Final answer
   x = 1,629,038.43