Finding the Third Proportional to 155,316 and 339,710

Step by Step Solution

1. Step 1: Write the proportion equation
   155,316 : 339,710 = 339,710 : x
2. Step 2: Convert to fraction form
   155,316/339,710 = 339,710/x
3. Step 3: Cross multiply
   155,316x = 339,710 × 339,710
4. Step 4: Simplify right side
   155,316x = 115,402,884,100
5. Step 5: Solve for x
   x = 115,402,884,100/155,316
6. Step 6: Final answer
   x = 743,019.93