Finding the Third Proportional to 144,678 and 311,550

Step by Step Solution

1. Step 1: Write the proportion equation
   144,678 : 311,550 = 311,550 : x
2. Step 2: Convert to fraction form
   144,678/311,550 = 311,550/x
3. Step 3: Cross multiply
   144,678x = 311,550 × 311,550
4. Step 4: Simplify right side
   144,678x = 97,063,402,500
5. Step 5: Solve for x
   x = 97,063,402,500/144,678
6. Step 6: Final answer
   x = 670,892.62