Finding the Third Proportional to 309,055,040 and 654,956,656

Step by Step Solution

1. Step 1: Write the proportion equation
   309,055,040 : 654,956,656 = 654,956,656 : x
2. Step 2: Convert to fraction form
   309,055,040/654,956,656 = 654,956,656/x
3. Step 3: Cross multiply
   309,055,040x = 654,956,656 × 654,956,656
4. Step 4: Simplify right side
   309,055,040x = 428,968,221,238,702,336
5. Step 5: Solve for x
   x = 428,968,221,238,702,336/309,055,040
6. Step 6: Final answer
   x = 1,387,999,436.08