Finding the Third Proportional to 406,601.54 and 858,978.21

Step by Step Solution

1. Step 1: Write the proportion equation
   406,601.54 : 858,978.21 = 858,978.21 : x
2. Step 2: Convert to fraction form
   406,601.54/858,978.21 = 858,978.21/x
3. Step 3: Cross multiply
   406,601.54x = 858,978.21 × 858,978.21
4. Step 4: Simplify right side
   406,601.54x = 737,843,566,865.39
5. Step 5: Solve for x
   x = 737,843,566,865.39/406,601.54
6. Step 6: Final answer
   x = 1,814,660.03