Finding the Third Proportional to 111,989.25 and 173,400.75

Step by Step Solution

1. Step 1: Write the proportion equation
   111,989.25 : 173,400.75 = 173,400.75 : x
2. Step 2: Convert to fraction form
   111,989.25/173,400.75 = 173,400.75/x
3. Step 3: Cross multiply
   111,989.25x = 173,400.75 × 173,400.75
4. Step 4: Simplify right side
   111,989.25x = 30,067,820,100.56
5. Step 5: Solve for x
   x = 30,067,820,100.56/111,989.25
6. Step 6: Final answer
   x = 268,488.45