Finding the Third Proportional to 393,807 and 858,883.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,807 : 858,883.50 = 858,883.50 : x
2. Step 2: Convert to fraction form
   393,807/858,883.50 = 858,883.50/x
3. Step 3: Cross multiply
   393,807x = 858,883.50 × 858,883.50
4. Step 4: Simplify right side
   393,807x = 737,680,866,572.25
5. Step 5: Solve for x
   x = 737,680,866,572.25/393,807
6. Step 6: Final answer
   x = 1,873,204.05