Finding the Third Proportional to 142,421.50 and 221,410

Step by Step Solution

1. Step 1: Write the proportion equation
   142,421.50 : 221,410 = 221,410 : x
2. Step 2: Convert to fraction form
   142,421.50/221,410 = 221,410/x
3. Step 3: Cross multiply
   142,421.50x = 221,410 × 221,410
4. Step 4: Simplify right side
   142,421.50x = 49,022,388,100
5. Step 5: Solve for x
   x = 49,022,388,100/142,421.50
6. Step 6: Final answer
   x = 344,206.37