Finding the Third Proportional to 144,136 and 215,628

Step by Step Solution

1. Step 1: Write the proportion equation
   144,136 : 215,628 = 215,628 : x
2. Step 2: Convert to fraction form
   144,136/215,628 = 215,628/x
3. Step 3: Cross multiply
   144,136x = 215,628 × 215,628
4. Step 4: Simplify right side
   144,136x = 46,495,434,384
5. Step 5: Solve for x
   x = 46,495,434,384/144,136
6. Step 6: Final answer
   x = 322,580.30