Finding the Third Proportional to 81,298.69 and 127,711.69

Step by Step Solution

1. Step 1: Write the proportion equation
   81,298.69 : 127,711.69 = 127,711.69 : x
2. Step 2: Convert to fraction form
   81,298.69/127,711.69 = 127,711.69/x
3. Step 3: Cross multiply
   81,298.69x = 127,711.69 × 127,711.69
4. Step 4: Simplify right side
   81,298.69x = 16,310,275,124.10
5. Step 5: Solve for x
   x = 16,310,275,124.10/81,298.69
6. Step 6: Final answer
   x = 200,621.63