Finding the Third Proportional to 393,804 and 858,876.75

Step by Step Solution

1. Step 1: Write the proportion equation
   393,804 : 858,876.75 = 858,876.75 : x
2. Step 2: Convert to fraction form
   393,804/858,876.75 = 858,876.75/x
3. Step 3: Cross multiply
   393,804x = 858,876.75 × 858,876.75
4. Step 4: Simplify right side
   393,804x = 737,669,271,690.56
5. Step 5: Solve for x
   x = 737,669,271,690.56/393,804
6. Step 6: Final answer
   x = 1,873,188.87