Finding the Third Proportional to 388,296 and 830,578.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,296 : 830,578.50 = 830,578.50 : x
2. Step 2: Convert to fraction form
   388,296/830,578.50 = 830,578.50/x
3. Step 3: Cross multiply
   388,296x = 830,578.50 × 830,578.50
4. Step 4: Simplify right side
   388,296x = 689,860,644,662.25
5. Step 5: Solve for x
   x = 689,860,644,662.25/388,296
6. Step 6: Final answer
   x = 1,776,635.98