Finding the Third Proportional to 308,838 and 671,820

Step by Step Solution

1. Step 1: Write the proportion equation
   308,838 : 671,820 = 671,820 : x
2. Step 2: Convert to fraction form
   308,838/671,820 = 671,820/x
3. Step 3: Cross multiply
   308,838x = 671,820 × 671,820
4. Step 4: Simplify right side
   308,838x = 451,342,112,400
5. Step 5: Solve for x
   x = 451,342,112,400/308,838
6. Step 6: Final answer
   x = 1,461,420.27