Finding the Third Proportional to 158,144 and 342,512

Step by Step Solution

1. Step 1: Write the proportion equation
   158,144 : 342,512 = 342,512 : x
2. Step 2: Convert to fraction form
   158,144/342,512 = 342,512/x
3. Step 3: Cross multiply
   158,144x = 342,512 × 342,512
4. Step 4: Simplify right side
   158,144x = 117,314,470,144
5. Step 5: Solve for x
   x = 117,314,470,144/158,144
6. Step 6: Final answer
   x = 741,820.56