Finding the Third Proportional to 310,003 and 648,045

Step by Step Solution

1. Step 1: Write the proportion equation
   310,003 : 648,045 = 648,045 : x
2. Step 2: Convert to fraction form
   310,003/648,045 = 648,045/x
3. Step 3: Cross multiply
   310,003x = 648,045 × 648,045
4. Step 4: Simplify right side
   310,003x = 419,962,322,025
5. Step 5: Solve for x
   x = 419,962,322,025/310,003
6. Step 6: Final answer
   x = 1,354,704.06