Finding the Third Proportional to 288,883.69 and 644,151.94

Step by Step Solution

1. Step 1: Write the proportion equation
   288,883.69 : 644,151.94 = 644,151.94 : x
2. Step 2: Convert to fraction form
   288,883.69/644,151.94 = 644,151.94/x
3. Step 3: Cross multiply
   288,883.69x = 644,151.94 × 644,151.94
4. Step 4: Simplify right side
   288,883.69x = 414,931,718,585.00
5. Step 5: Solve for x
   x = 414,931,718,585.00/288,883.69
6. Step 6: Final answer
   x = 1,436,327.96