Finding the Third Proportional to 323,144 and 699,280

Step by Step Solution

1. Step 1: Write the proportion equation
   323,144 : 699,280 = 699,280 : x
2. Step 2: Convert to fraction form
   323,144/699,280 = 699,280/x
3. Step 3: Cross multiply
   323,144x = 699,280 × 699,280
4. Step 4: Simplify right side
   323,144x = 488,992,518,400
5. Step 5: Solve for x
   x = 488,992,518,400/323,144
6. Step 6: Final answer
   x = 1,513,234.10