Finding the Third Proportional to 388,404.75 and 830,778

Step by Step Solution

1. Step 1: Write the proportion equation
   388,404.75 : 830,778 = 830,778 : x
2. Step 2: Convert to fraction form
   388,404.75/830,778 = 830,778/x
3. Step 3: Cross multiply
   388,404.75x = 830,778 × 830,778
4. Step 4: Simplify right side
   388,404.75x = 690,192,085,284
5. Step 5: Solve for x
   x = 690,192,085,284/388,404.75
6. Step 6: Final answer
   x = 1,776,991.88