Finding the Third Proportional to 144,420 and 308,160

Step by Step Solution

1. Step 1: Write the proportion equation
   144,420 : 308,160 = 308,160 : x
2. Step 2: Convert to fraction form
   144,420/308,160 = 308,160/x
3. Step 3: Cross multiply
   144,420x = 308,160 × 308,160
4. Step 4: Simplify right side
   144,420x = 94,962,585,600
5. Step 5: Solve for x
   x = 94,962,585,600/144,420
6. Step 6: Final answer
   x = 657,544.56