Finding the Third Proportional to 780,399,580 and 1,062,951,990

Step by Step Solution

1. Step 1: Write the proportion equation
   780,399,580 : 1,062,951,990 = 1,062,951,990 : x
2. Step 2: Convert to fraction form
   780,399,580/1,062,951,990 = 1,062,951,990/x
3. Step 3: Cross multiply
   780,399,580x = 1,062,951,990 × 1,062,951,990
4. Step 4: Simplify right side
   780,399,580x = 1,129,866,933,044,960,128
5. Step 5: Solve for x
   x = 1,129,866,933,044,960,128/780,399,580
6. Step 6: Final answer
   x = 1,447,805,665.20