Finding the Third Proportional to 83,976 and 128,856

Step by Step Solution

1. Step 1: Write the proportion equation
   83,976 : 128,856 = 128,856 : x
2. Step 2: Convert to fraction form
   83,976/128,856 = 128,856/x
3. Step 3: Cross multiply
   83,976x = 128,856 × 128,856
4. Step 4: Simplify right side
   83,976x = 16,603,868,736
5. Step 5: Solve for x
   x = 16,603,868,736/83,976
6. Step 6: Final answer
   x = 197,721.60