Finding the Third Proportional to 158,139 and 340,456

Step by Step Solution

1. Step 1: Write the proportion equation
   158,139 : 340,456 = 340,456 : x
2. Step 2: Convert to fraction form
   158,139/340,456 = 340,456/x
3. Step 3: Cross multiply
   158,139x = 340,456 × 340,456
4. Step 4: Simplify right side
   158,139x = 115,910,287,936
5. Step 5: Solve for x
   x = 115,910,287,936/158,139
6. Step 6: Final answer
   x = 732,964.59