Finding the Third Proportional to 144,444 and 215,458

Step by Step Solution

1. Step 1: Write the proportion equation
   144,444 : 215,458 = 215,458 : x
2. Step 2: Convert to fraction form
   144,444/215,458 = 215,458/x
3. Step 3: Cross multiply
   144,444x = 215,458 × 215,458
4. Step 4: Simplify right side
   144,444x = 46,422,149,764
5. Step 5: Solve for x
   x = 46,422,149,764/144,444
6. Step 6: Final answer
   x = 321,385.10