Finding the Third Proportional to 287,105,830 and 629,795,968

Step by Step Solution

1. Step 1: Write the proportion equation
   287,105,830 : 629,795,968 = 629,795,968 : x
2. Step 2: Convert to fraction form
   287,105,830/629,795,968 = 629,795,968/x
3. Step 3: Cross multiply
   287,105,830x = 629,795,968 × 629,795,968
4. Step 4: Simplify right side
   287,105,830x = 396,642,961,309,057,024
5. Step 5: Solve for x
   x = 396,642,961,309,057,024/287,105,830
6. Step 6: Final answer
   x = 1,381,521,793.93