Finding the Third Proportional to 144,892.50 and 311,208

Step by Step Solution

1. Step 1: Write the proportion equation
   144,892.50 : 311,208 = 311,208 : x
2. Step 2: Convert to fraction form
   144,892.50/311,208 = 311,208/x
3. Step 3: Cross multiply
   144,892.50x = 311,208 × 311,208
4. Step 4: Simplify right side
   144,892.50x = 96,850,419,264
5. Step 5: Solve for x
   x = 96,850,419,264/144,892.50
6. Step 6: Final answer
   x = 668,429.49