Finding the Third Proportional to 388,444 and 830,858

Step by Step Solution

1. Step 1: Write the proportion equation
   388,444 : 830,858 = 830,858 : x
2. Step 2: Convert to fraction form
   388,444/830,858 = 830,858/x
3. Step 3: Cross multiply
   388,444x = 830,858 × 830,858
4. Step 4: Simplify right side
   388,444x = 690,325,016,164
5. Step 5: Solve for x
   x = 690,325,016,164/388,444
6. Step 6: Final answer
   x = 1,777,154.53