Finding the Third Proportional to 144,910 and 221,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,910 : 221,687.50 = 221,687.50 : x
2. Step 2: Convert to fraction form
   144,910/221,687.50 = 221,687.50/x
3. Step 3: Cross multiply
   144,910x = 221,687.50 × 221,687.50
4. Step 4: Simplify right side
   144,910x = 49,145,347,656.25
5. Step 5: Solve for x
   x = 49,145,347,656.25/144,910
6. Step 6: Final answer
   x = 339,143.94