Finding the Third Proportional to 393,786 and 858,845.25

Step by Step Solution

1. Step 1: Write the proportion equation
   393,786 : 858,845.25 = 858,845.25 : x
2. Step 2: Convert to fraction form
   393,786/858,845.25 = 858,845.25/x
3. Step 3: Cross multiply
   393,786x = 858,845.25 × 858,845.25
4. Step 4: Simplify right side
   393,786x = 737,615,163,447.56
5. Step 5: Solve for x
   x = 737,615,163,447.56/393,786
6. Step 6: Final answer
   x = 1,873,137.09