Finding the Third Proportional to 80,780 and 123,992

Step by Step Solution

1. Step 1: Write the proportion equation
   80,780 : 123,992 = 123,992 : x
2. Step 2: Convert to fraction form
   80,780/123,992 = 123,992/x
3. Step 3: Cross multiply
   80,780x = 123,992 × 123,992
4. Step 4: Simplify right side
   80,780x = 15,374,016,064
5. Step 5: Solve for x
   x = 15,374,016,064/80,780
6. Step 6: Final answer
   x = 190,319.58