Finding the Third Proportional to 159,818.50 and 339,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   159,818.50 : 339,345.50 = 339,345.50 : x
2. Step 2: Convert to fraction form
   159,818.50/339,345.50 = 339,345.50/x
3. Step 3: Cross multiply
   159,818.50x = 339,345.50 × 339,345.50
4. Step 4: Simplify right side
   159,818.50x = 115,155,368,370.25
5. Step 5: Solve for x
   x = 115,155,368,370.25/159,818.50
6. Step 6: Final answer
   x = 720,538.41