Finding the Third Proportional to 388,272 and 603,144

Step by Step Solution

1. Step 1: Write the proportion equation
   388,272 : 603,144 = 603,144 : x
2. Step 2: Convert to fraction form
   388,272/603,144 = 603,144/x
3. Step 3: Cross multiply
   388,272x = 603,144 × 603,144
4. Step 4: Simplify right side
   388,272x = 363,782,684,736
5. Step 5: Solve for x
   x = 363,782,684,736/388,272
6. Step 6: Final answer
   x = 936,927.42