Finding the Third Proportional to 456,144 and 699,670

Step by Step Solution

1. Step 1: Write the proportion equation
   456,144 : 699,670 = 699,670 : x
2. Step 2: Convert to fraction form
   456,144/699,670 = 699,670/x
3. Step 3: Cross multiply
   456,144x = 699,670 × 699,670
4. Step 4: Simplify right side
   456,144x = 489,538,108,900
5. Step 5: Solve for x
   x = 489,538,108,900/456,144
6. Step 6: Final answer
   x = 1,073,209.58