Finding the Third Proportional to 245,514 and 388,152

Step by Step Solution

1. Step 1: Write the proportion equation
   245,514 : 388,152 = 388,152 : x
2. Step 2: Convert to fraction form
   245,514/388,152 = 388,152/x
3. Step 3: Cross multiply
   245,514x = 388,152 × 388,152
4. Step 4: Simplify right side
   245,514x = 150,661,975,104
5. Step 5: Solve for x
   x = 150,661,975,104/245,514
6. Step 6: Final answer
   x = 613,659.40