Finding the Third Proportional to 317,953.50 and 673,815

Step by Step Solution

1. Step 1: Write the proportion equation
   317,953.50 : 673,815 = 673,815 : x
2. Step 2: Convert to fraction form
   317,953.50/673,815 = 673,815/x
3. Step 3: Cross multiply
   317,953.50x = 673,815 × 673,815
4. Step 4: Simplify right side
   317,953.50x = 454,026,654,225
5. Step 5: Solve for x
   x = 454,026,654,225/317,953.50
6. Step 6: Final answer
   x = 1,427,965.58