Finding the Third Proportional to 393,786.50 and 858,843

Step by Step Solution

1. Step 1: Write the proportion equation
   393,786.50 : 858,843 = 858,843 : x
2. Step 2: Convert to fraction form
   393,786.50/858,843 = 858,843/x
3. Step 3: Cross multiply
   393,786.50x = 858,843 × 858,843
4. Step 4: Simplify right side
   393,786.50x = 737,611,298,649
5. Step 5: Solve for x
   x = 737,611,298,649/393,786.50
6. Step 6: Final answer
   x = 1,873,124.90