Finding the Third Proportional to 155,619 and 243,864

Step by Step Solution

1. Step 1: Write the proportion equation
   155,619 : 243,864 = 243,864 : x
2. Step 2: Convert to fraction form
   155,619/243,864 = 243,864/x
3. Step 3: Cross multiply
   155,619x = 243,864 × 243,864
4. Step 4: Simplify right side
   155,619x = 59,469,650,496
5. Step 5: Solve for x
   x = 59,469,650,496/155,619
6. Step 6: Final answer
   x = 382,149.03