Finding the Third Proportional to 339,877.69 and 476,440.31

Step by Step Solution

1. Step 1: Write the proportion equation
   339,877.69 : 476,440.31 = 476,440.31 : x
2. Step 2: Convert to fraction form
   339,877.69/476,440.31 = 476,440.31/x
3. Step 3: Cross multiply
   339,877.69x = 476,440.31 × 476,440.31
4. Step 4: Simplify right side
   339,877.69x = 226,995,371,375.10
5. Step 5: Solve for x
   x = 226,995,371,375.10/339,877.69
6. Step 6: Final answer
   x = 667,873.71