Finding the Third Proportional to 83,215.69 and 128,035.69

Step by Step Solution

1. Step 1: Write the proportion equation
   83,215.69 : 128,035.69 = 128,035.69 : x
2. Step 2: Convert to fraction form
   83,215.69/128,035.69 = 128,035.69/x
3. Step 3: Cross multiply
   83,215.69x = 128,035.69 × 128,035.69
4. Step 4: Simplify right side
   83,215.69x = 16,393,137,273.60
5. Step 5: Solve for x
   x = 16,393,137,273.60/83,215.69
6. Step 6: Final answer
   x = 196,995.76