Finding the Third Proportional to 144,197 and 215,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,197 : 215,099.50 = 215,099.50 : x
2. Step 2: Convert to fraction form
   144,197/215,099.50 = 215,099.50/x
3. Step 3: Cross multiply
   144,197x = 215,099.50 × 215,099.50
4. Step 4: Simplify right side
   144,197x = 46,267,794,900.25
5. Step 5: Solve for x
   x = 46,267,794,900.25/144,197
6. Step 6: Final answer
   x = 320,865.17