Finding the Third Proportional to 297,552 and 645,648

Step by Step Solution

1. Step 1: Write the proportion equation
   297,552 : 645,648 = 645,648 : x
2. Step 2: Convert to fraction form
   297,552/645,648 = 645,648/x
3. Step 3: Cross multiply
   297,552x = 645,648 × 645,648
4. Step 4: Simplify right side
   297,552x = 416,861,339,904
5. Step 5: Solve for x
   x = 416,861,339,904/297,552
6. Step 6: Final answer
   x = 1,400,969.71