Finding the Third Proportional to 439,634,648 and 680,111,778

Step by Step Solution

1. Step 1: Write the proportion equation
   439,634,648 : 680,111,778 = 680,111,778 : x
2. Step 2: Convert to fraction form
   439,634,648/680,111,778 = 680,111,778/x
3. Step 3: Cross multiply
   439,634,648x = 680,111,778 × 680,111,778
4. Step 4: Simplify right side
   439,634,648x = 462,552,030,574,321,280
5. Step 5: Solve for x
   x = 462,552,030,574,321,280/439,634,648
6. Step 6: Final answer
   x = 1,052,128,244.85