Finding the Third Proportional to 277,499 and 654,855

Step by Step Solution

1. Step 1: Write the proportion equation
   277,499 : 654,855 = 654,855 : x
2. Step 2: Convert to fraction form
   277,499/654,855 = 654,855/x
3. Step 3: Cross multiply
   277,499x = 654,855 × 654,855
4. Step 4: Simplify right side
   277,499x = 428,835,071,025
5. Step 5: Solve for x
   x = 428,835,071,025/277,499
6. Step 6: Final answer
   x = 1,545,357.18