Finding the Third Proportional to 154,686 and 339,264

Step by Step Solution

1. Step 1: Write the proportion equation
   154,686 : 339,264 = 339,264 : x
2. Step 2: Convert to fraction form
   154,686/339,264 = 339,264/x
3. Step 3: Cross multiply
   154,686x = 339,264 × 339,264
4. Step 4: Simplify right side
   154,686x = 115,100,061,696
5. Step 5: Solve for x
   x = 115,100,061,696/154,686
6. Step 6: Final answer
   x = 744,088.42