Finding the Third Proportional to 309,051 and 677,160

Step by Step Solution

1. Step 1: Write the proportion equation
   309,051 : 677,160 = 677,160 : x
2. Step 2: Convert to fraction form
   309,051/677,160 = 677,160/x
3. Step 3: Cross multiply
   309,051x = 677,160 × 677,160
4. Step 4: Simplify right side
   309,051x = 458,545,665,600
5. Step 5: Solve for x
   x = 458,545,665,600/309,051
6. Step 6: Final answer
   x = 1,483,721.67