Finding the Third Proportional to 83,379.38 and 128,972.25

Step by Step Solution

1. Step 1: Write the proportion equation
   83,379.38 : 128,972.25 = 128,972.25 : x
2. Step 2: Convert to fraction form
   83,379.38/128,972.25 = 128,972.25/x
3. Step 3: Cross multiply
   83,379.38x = 128,972.25 × 128,972.25
4. Step 4: Simplify right side
   83,379.38x = 16,633,841,270.06
5. Step 5: Solve for x
   x = 16,633,841,270.06/83,379.38
6. Step 6: Final answer
   x = 199,495.87