Finding the Third Proportional to 142,485 and 221,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,485 : 221,505.50 = 221,505.50 : x
2. Step 2: Convert to fraction form
   142,485/221,505.50 = 221,505.50/x
3. Step 3: Cross multiply
   142,485x = 221,505.50 × 221,505.50
4. Step 4: Simplify right side
   142,485x = 49,064,686,530.25
5. Step 5: Solve for x
   x = 49,064,686,530.25/142,485
6. Step 6: Final answer
   x = 344,349.84