Finding the Third Proportional to 144,610.31 and 311,419.69

Step by Step Solution

1. Step 1: Write the proportion equation
   144,610.31 : 311,419.69 = 311,419.69 : x
2. Step 2: Convert to fraction form
   144,610.31/311,419.69 = 311,419.69/x
3. Step 3: Cross multiply
   144,610.31x = 311,419.69 × 311,419.69
4. Step 4: Simplify right side
   144,610.31x = 96,982,221,762.60
5. Step 5: Solve for x
   x = 96,982,221,762.60/144,610.31
6. Step 6: Final answer
   x = 670,645.27