Finding the Third Proportional to 388,816 and 609,144

Step by Step Solution

1. Step 1: Write the proportion equation
   388,816 : 609,144 = 609,144 : x
2. Step 2: Convert to fraction form
   388,816/609,144 = 609,144/x
3. Step 3: Cross multiply
   388,816x = 609,144 × 609,144
4. Step 4: Simplify right side
   388,816x = 371,056,412,736
5. Step 5: Solve for x
   x = 371,056,412,736/388,816
6. Step 6: Final answer
   x = 954,323.93