Finding the Third Proportional to 67,620 and 144,286

Step by Step Solution

1. Step 1: Write the proportion equation
   67,620 : 144,286 = 144,286 : x
2. Step 2: Convert to fraction form
   67,620/144,286 = 144,286/x
3. Step 3: Cross multiply
   67,620x = 144,286 × 144,286
4. Step 4: Simplify right side
   67,620x = 20,818,449,796
5. Step 5: Solve for x
   x = 20,818,449,796/67,620
6. Step 6: Final answer
   x = 307,874.15