Finding the Third Proportional to 155,820 and 339,864

Step by Step Solution

1. Step 1: Write the proportion equation
   155,820 : 339,864 = 339,864 : x
2. Step 2: Convert to fraction form
   155,820/339,864 = 339,864/x
3. Step 3: Cross multiply
   155,820x = 339,864 × 339,864
4. Step 4: Simplify right side
   155,820x = 115,507,538,496
5. Step 5: Solve for x
   x = 115,507,538,496/155,820
6. Step 6: Final answer
   x = 741,288.27