Finding the Third Proportional to 111,039 and 169,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,039 : 169,321.50 = 169,321.50 : x
2. Step 2: Convert to fraction form
   111,039/169,321.50 = 169,321.50/x
3. Step 3: Cross multiply
   111,039x = 169,321.50 × 169,321.50
4. Step 4: Simplify right side
   111,039x = 28,669,770,362.25
5. Step 5: Solve for x
   x = 28,669,770,362.25/111,039
6. Step 6: Final answer
   x = 258,195.50