Finding the Third Proportional to 142,735.50 and 212,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,735.50 : 212,449.50 = 212,449.50 : x
2. Step 2: Convert to fraction form
   142,735.50/212,449.50 = 212,449.50/x
3. Step 3: Cross multiply
   142,735.50x = 212,449.50 × 212,449.50
4. Step 4: Simplify right side
   142,735.50x = 45,134,790,050.25
5. Step 5: Solve for x
   x = 45,134,790,050.25/142,735.50
6. Step 6: Final answer
   x = 316,212.79