Finding the Third Proportional to 418,405.50 and 858,863.25

Step by Step Solution

1. Step 1: Write the proportion equation
   418,405.50 : 858,863.25 = 858,863.25 : x
2. Step 2: Convert to fraction form
   418,405.50/858,863.25 = 858,863.25/x
3. Step 3: Cross multiply
   418,405.50x = 858,863.25 × 858,863.25
4. Step 4: Simplify right side
   418,405.50x = 737,646,082,200.56
5. Step 5: Solve for x
   x = 737,646,082,200.56/418,405.50
6. Step 6: Final answer
   x = 1,762,993.27