Finding the Third Proportional to 142,078 and 212,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,078 : 212,144.50 = 212,144.50 : x
2. Step 2: Convert to fraction form
   142,078/212,144.50 = 212,144.50/x
3. Step 3: Cross multiply
   142,078x = 212,144.50 × 212,144.50
4. Step 4: Simplify right side
   142,078x = 45,005,288,880.25
5. Step 5: Solve for x
   x = 45,005,288,880.25/142,078
6. Step 6: Final answer
   x = 316,764.66