Finding the Third Proportional to 81,389.50 and 169,016.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,389.50 : 169,016.50 = 169,016.50 : x
2. Step 2: Convert to fraction form
   81,389.50/169,016.50 = 169,016.50/x
3. Step 3: Cross multiply
   81,389.50x = 169,016.50 × 169,016.50
4. Step 4: Simplify right side
   81,389.50x = 28,566,577,272.25
5. Step 5: Solve for x
   x = 28,566,577,272.25/81,389.50
6. Step 6: Final answer
   x = 350,986.03