Finding the Third Proportional to 1,420,620 and 3,121,176

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420,620 : 3,121,176 = 3,121,176 : x
2. Step 2: Convert to fraction form
   1,420,620/3,121,176 = 3,121,176/x
3. Step 3: Cross multiply
   1,420,620x = 3,121,176 × 3,121,176
4. Step 4: Simplify right side
   1,420,620x = 9,741,739,622,976
5. Step 5: Solve for x
   x = 9,741,739,622,976/1,420,620
6. Step 6: Final answer
   x = 6,857,385.95