Finding the Third Proportional to 687,754,878 and 1,510,621,012

Step by Step Solution

1. Step 1: Write the proportion equation
   687,754,878 : 1,510,621,012 = 1,510,621,012 : x
2. Step 2: Convert to fraction form
   687,754,878/1,510,621,012 = 1,510,621,012/x
3. Step 3: Cross multiply
   687,754,878x = 1,510,621,012 × 1,510,621,012
4. Step 4: Simplify right side
   687,754,878x = 2,281,975,841,895,904,256
5. Step 5: Solve for x
   x = 2,281,975,841,895,904,256/687,754,878
6. Step 6: Final answer
   x = 3,318,007,497.86