Finding the Third Proportional to 144,405 and 316,710

Step by Step Solution

1. Step 1: Write the proportion equation
   144,405 : 316,710 = 316,710 : x
2. Step 2: Convert to fraction form
   144,405/316,710 = 316,710/x
3. Step 3: Cross multiply
   144,405x = 316,710 × 316,710
4. Step 4: Simplify right side
   144,405x = 100,305,224,100
5. Step 5: Solve for x
   x = 100,305,224,100/144,405
6. Step 6: Final answer
   x = 694,610.46