Finding the Third Proportional to 144,595.50 and 216,039

Step by Step Solution

1. Step 1: Write the proportion equation
   144,595.50 : 216,039 = 216,039 : x
2. Step 2: Convert to fraction form
   144,595.50/216,039 = 216,039/x
3. Step 3: Cross multiply
   144,595.50x = 216,039 × 216,039
4. Step 4: Simplify right side
   144,595.50x = 46,672,849,521
5. Step 5: Solve for x
   x = 46,672,849,521/144,595.50
6. Step 6: Final answer
   x = 322,782.17