Finding the Third Proportional to 67,621 and 144,288

Step by Step Solution

1. Step 1: Write the proportion equation
   67,621 : 144,288 = 144,288 : x
2. Step 2: Convert to fraction form
   67,621/144,288 = 144,288/x
3. Step 3: Cross multiply
   67,621x = 144,288 × 144,288
4. Step 4: Simplify right side
   67,621x = 20,819,026,944
5. Step 5: Solve for x
   x = 20,819,026,944/67,621
6. Step 6: Final answer
   x = 307,878.13