Finding the Third Proportional to 144,816 and 309,360

Step by Step Solution

1. Step 1: Write the proportion equation
   144,816 : 309,360 = 309,360 : x
2. Step 2: Convert to fraction form
   144,816/309,360 = 309,360/x
3. Step 3: Cross multiply
   144,816x = 309,360 × 309,360
4. Step 4: Simplify right side
   144,816x = 95,703,609,600
5. Step 5: Solve for x
   x = 95,703,609,600/144,816
6. Step 6: Final answer
   x = 660,863.51