Finding the Third Proportional to 158,739.75 and 339,607.69

Step by Step Solution

1. Step 1: Write the proportion equation
   158,739.75 : 339,607.69 = 339,607.69 : x
2. Step 2: Convert to fraction form
   158,739.75/339,607.69 = 339,607.69/x
3. Step 3: Cross multiply
   158,739.75x = 339,607.69 × 339,607.69
4. Step 4: Simplify right side
   158,739.75x = 115,333,381,409.10
5. Step 5: Solve for x
   x = 115,333,381,409.10/158,739.75
6. Step 6: Final answer
   x = 726,556.40