Finding the Third Proportional to 99,221 and 144,451

Step by Step Solution

1. Step 1: Write the proportion equation
   99,221 : 144,451 = 144,451 : x
2. Step 2: Convert to fraction form
   99,221/144,451 = 144,451/x
3. Step 3: Cross multiply
   99,221x = 144,451 × 144,451
4. Step 4: Simplify right side
   99,221x = 20,866,091,401
5. Step 5: Solve for x
   x = 20,866,091,401/99,221
6. Step 6: Final answer
   x = 210,299.14