Finding the Third Proportional to 439,634,740 and 680,111,970

Step by Step Solution

1. Step 1: Write the proportion equation
   439,634,740 : 680,111,970 = 680,111,970 : x
2. Step 2: Convert to fraction form
   439,634,740/680,111,970 = 680,111,970/x
3. Step 3: Cross multiply
   439,634,740x = 680,111,970 × 680,111,970
4. Step 4: Simplify right side
   439,634,740x = 462,552,291,737,280,896
5. Step 5: Solve for x
   x = 462,552,291,737,280,896/439,634,740
6. Step 6: Final answer
   x = 1,052,128,618.72