Finding the Third Proportional to 81,406.50 and 127,320

Step by Step Solution

1. Step 1: Write the proportion equation
   81,406.50 : 127,320 = 127,320 : x
2. Step 2: Convert to fraction form
   81,406.50/127,320 = 127,320/x
3. Step 3: Cross multiply
   81,406.50x = 127,320 × 127,320
4. Step 4: Simplify right side
   81,406.50x = 16,210,382,400
5. Step 5: Solve for x
   x = 16,210,382,400/81,406.50
6. Step 6: Final answer
   x = 199,128.85