Finding the Third Proportional to 8,629,530 and 13,398,990

Step by Step Solution

1. Step 1: Write the proportion equation
   8,629,530 : 13,398,990 = 13,398,990 : x
2. Step 2: Convert to fraction form
   8,629,530/13,398,990 = 13,398,990/x
3. Step 3: Cross multiply
   8,629,530x = 13,398,990 × 13,398,990
4. Step 4: Simplify right side
   8,629,530x = 179,532,933,020,100
5. Step 5: Solve for x
   x = 179,532,933,020,100/8,629,530
6. Step 6: Final answer
   x = 20,804,485.65