Finding the Third Proportional to 81,389 and 169,015.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,389 : 169,015.50 = 169,015.50 : x
2. Step 2: Convert to fraction form
   81,389/169,015.50 = 169,015.50/x
3. Step 3: Cross multiply
   81,389x = 169,015.50 × 169,015.50
4. Step 4: Simplify right side
   81,389x = 28,566,239,240.25
5. Step 5: Solve for x
   x = 28,566,239,240.25/81,389
6. Step 6: Final answer
   x = 350,984.03