Finding the Third Proportional to 388,830 and 804,652.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,830 : 804,652.50 = 804,652.50 : x
2. Step 2: Convert to fraction form
   388,830/804,652.50 = 804,652.50/x
3. Step 3: Cross multiply
   388,830x = 804,652.50 × 804,652.50
4. Step 4: Simplify right side
   388,830x = 647,465,645,756.25
5. Step 5: Solve for x
   x = 647,465,645,756.25/388,830
6. Step 6: Final answer
   x = 1,665,163.81