Finding the Third Proportional to 317,778 and 657,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,778 : 657,553.50 = 657,553.50 : x
2. Step 2: Convert to fraction form
   317,778/657,553.50 = 657,553.50/x
3. Step 3: Cross multiply
   317,778x = 657,553.50 × 657,553.50
4. Step 4: Simplify right side
   317,778x = 432,376,605,362.25
5. Step 5: Solve for x
   x = 432,376,605,362.25/317,778
6. Step 6: Final answer
   x = 1,360,624.73