Finding the Third Proportional to 105,712.50 and 144,960

Step by Step Solution

1. Step 1: Write the proportion equation
   105,712.50 : 144,960 = 144,960 : x
2. Step 2: Convert to fraction form
   105,712.50/144,960 = 144,960/x
3. Step 3: Cross multiply
   105,712.50x = 144,960 × 144,960
4. Step 4: Simplify right side
   105,712.50x = 21,013,401,600
5. Step 5: Solve for x
   x = 21,013,401,600/105,712.50
6. Step 6: Final answer
   x = 198,778.78