Finding the Third Proportional to 144,574.50 and 313,281

Step by Step Solution

1. Step 1: Write the proportion equation
   144,574.50 : 313,281 = 313,281 : x
2. Step 2: Convert to fraction form
   144,574.50/313,281 = 313,281/x
3. Step 3: Cross multiply
   144,574.50x = 313,281 × 313,281
4. Step 4: Simplify right side
   144,574.50x = 98,144,984,961
5. Step 5: Solve for x
   x = 98,144,984,961/144,574.50
6. Step 6: Final answer
   x = 678,854.05