Finding the Third Proportional to 158,789.50 and 343,499

Step by Step Solution

1. Step 1: Write the proportion equation
   158,789.50 : 343,499 = 343,499 : x
2. Step 2: Convert to fraction form
   158,789.50/343,499 = 343,499/x
3. Step 3: Cross multiply
   158,789.50x = 343,499 × 343,499
4. Step 4: Simplify right side
   158,789.50x = 117,991,563,001
5. Step 5: Solve for x
   x = 117,991,563,001/158,789.50
6. Step 6: Final answer
   x = 743,069.05