Finding the Third Proportional to 144,008 and 215,436

Step by Step Solution

1. Step 1: Write the proportion equation
   144,008 : 215,436 = 215,436 : x
2. Step 2: Convert to fraction form
   144,008/215,436 = 215,436/x
3. Step 3: Cross multiply
   144,008x = 215,436 × 215,436
4. Step 4: Simplify right side
   144,008x = 46,412,670,096
5. Step 5: Solve for x
   x = 46,412,670,096/144,008
6. Step 6: Final answer
   x = 322,292.30