Finding the Third Proportional to 142,078.50 and 219,450

Step by Step Solution

1. Step 1: Write the proportion equation
   142,078.50 : 219,450 = 219,450 : x
2. Step 2: Convert to fraction form
   142,078.50/219,450 = 219,450/x
3. Step 3: Cross multiply
   142,078.50x = 219,450 × 219,450
4. Step 4: Simplify right side
   142,078.50x = 48,158,302,500
5. Step 5: Solve for x
   x = 48,158,302,500/142,078.50
6. Step 6: Final answer
   x = 338,955.59