Finding the Third Proportional to 295,562.50 and 640,517

Step by Step Solution

1. Step 1: Write the proportion equation
   295,562.50 : 640,517 = 640,517 : x
2. Step 2: Convert to fraction form
   295,562.50/640,517 = 640,517/x
3. Step 3: Cross multiply
   295,562.50x = 640,517 × 640,517
4. Step 4: Simplify right side
   295,562.50x = 410,262,027,289
5. Step 5: Solve for x
   x = 410,262,027,289/295,562.50
6. Step 6: Final answer
   x = 1,388,071.99