Finding the Third Proportional to 123,057 and 268,890.75

Step by Step Solution

1. Step 1: Write the proportion equation
   123,057 : 268,890.75 = 268,890.75 : x
2. Step 2: Convert to fraction form
   123,057/268,890.75 = 268,890.75/x
3. Step 3: Cross multiply
   123,057x = 268,890.75 × 268,890.75
4. Step 4: Simplify right side
   123,057x = 72,302,235,435.56
5. Step 5: Solve for x
   x = 72,302,235,435.56/123,057
6. Step 6: Final answer
   x = 587,550.77