Finding the Third Proportional to 121,117.50 and 173,371.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,117.50 : 173,371.50 = 173,371.50 : x
2. Step 2: Convert to fraction form
   121,117.50/173,371.50 = 173,371.50/x
3. Step 3: Cross multiply
   121,117.50x = 173,371.50 × 173,371.50
4. Step 4: Simplify right side
   121,117.50x = 30,057,677,012.25
5. Step 5: Solve for x
   x = 30,057,677,012.25/121,117.50
6. Step 6: Final answer
   x = 248,169.56