Finding the Third Proportional to 145,930.50 and 309,433.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,930.50 : 309,433.50 = 309,433.50 : x
2. Step 2: Convert to fraction form
   145,930.50/309,433.50 = 309,433.50/x
3. Step 3: Cross multiply
   145,930.50x = 309,433.50 × 309,433.50
4. Step 4: Simplify right side
   145,930.50x = 95,749,090,922.25
5. Step 5: Solve for x
   x = 95,749,090,922.25/145,930.50
6. Step 6: Final answer
   x = 656,128.03