Finding the Third Proportional to 121,300 and 173,693

Step by Step Solution

1. Step 1: Write the proportion equation
   121,300 : 173,693 = 173,693 : x
2. Step 2: Convert to fraction form
   121,300/173,693 = 173,693/x
3. Step 3: Cross multiply
   121,300x = 173,693 × 173,693
4. Step 4: Simplify right side
   121,300x = 30,169,258,249
5. Step 5: Solve for x
   x = 30,169,258,249/121,300
6. Step 6: Final answer
   x = 248,716.06