Finding the Third Proportional to 295,414.50 and 644,298

Step by Step Solution

1. Step 1: Write the proportion equation
   295,414.50 : 644,298 = 644,298 : x
2. Step 2: Convert to fraction form
   295,414.50/644,298 = 644,298/x
3. Step 3: Cross multiply
   295,414.50x = 644,298 × 644,298
4. Step 4: Simplify right side
   295,414.50x = 415,119,912,804
5. Step 5: Solve for x
   x = 415,119,912,804/295,414.50
6. Step 6: Final answer
   x = 1,405,211.70