Finding the Third Proportional to 142,422 and 221,410.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,422 : 221,410.50 = 221,410.50 : x
2. Step 2: Convert to fraction form
   142,422/221,410.50 = 221,410.50/x
3. Step 3: Cross multiply
   142,422x = 221,410.50 × 221,410.50
4. Step 4: Simplify right side
   142,422x = 49,022,609,510.25
5. Step 5: Solve for x
   x = 49,022,609,510.25/142,422
6. Step 6: Final answer
   x = 344,206.72