Finding the Third Proportional to 388,824 and 804,640.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,824 : 804,640.50 = 804,640.50 : x
2. Step 2: Convert to fraction form
   388,824/804,640.50 = 804,640.50/x
3. Step 3: Cross multiply
   388,824x = 804,640.50 × 804,640.50
4. Step 4: Simplify right side
   388,824x = 647,446,334,240.25
5. Step 5: Solve for x
   x = 647,446,334,240.25/388,824
6. Step 6: Final answer
   x = 1,665,139.84