Finding the Third Proportional to 301,809 and 628,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   301,809 : 628,411.50 = 628,411.50 : x
2. Step 2: Convert to fraction form
   301,809/628,411.50 = 628,411.50/x
3. Step 3: Cross multiply
   301,809x = 628,411.50 × 628,411.50
4. Step 4: Simplify right side
   301,809x = 394,901,013,332.25
5. Step 5: Solve for x
   x = 394,901,013,332.25/301,809
6. Step 6: Final answer
   x = 1,308,446.78