Finding the Third Proportional to 298,265 and 631,078

Step by Step Solution

1. Step 1: Write the proportion equation
   298,265 : 631,078 = 631,078 : x
2. Step 2: Convert to fraction form
   298,265/631,078 = 631,078/x
3. Step 3: Cross multiply
   298,265x = 631,078 × 631,078
4. Step 4: Simplify right side
   298,265x = 398,259,442,084
5. Step 5: Solve for x
   x = 398,259,442,084/298,265
6. Step 6: Final answer
   x = 1,335,253.69