Finding the Third Proportional to 309,055,042 and 654,956,660

Step by Step Solution

1. Step 1: Write the proportion equation
   309,055,042 : 654,956,660 = 654,956,660 : x
2. Step 2: Convert to fraction form
   309,055,042/654,956,660 = 654,956,660/x
3. Step 3: Cross multiply
   309,055,042x = 654,956,660 × 654,956,660
4. Step 4: Simplify right side
   309,055,042x = 428,968,226,478,355,584
5. Step 5: Solve for x
   x = 428,968,226,478,355,584/309,055,042
6. Step 6: Final answer
   x = 1,387,999,444.05