Finding the Third Proportional to 384,739 and 660,144

Step by Step Solution

1. Step 1: Write the proportion equation
   384,739 : 660,144 = 660,144 : x
2. Step 2: Convert to fraction form
   384,739/660,144 = 660,144/x
3. Step 3: Cross multiply
   384,739x = 660,144 × 660,144
4. Step 4: Simplify right side
   384,739x = 435,790,100,736
5. Step 5: Solve for x
   x = 435,790,100,736/384,739
6. Step 6: Final answer
   x = 1,132,690.22