Finding the Third Proportional to 678,820 and 1,425,896

Step by Step Solution

1. Step 1: Write the proportion equation
   678,820 : 1,425,896 = 1,425,896 : x
2. Step 2: Convert to fraction form
   678,820/1,425,896 = 1,425,896/x
3. Step 3: Cross multiply
   678,820x = 1,425,896 × 1,425,896
4. Step 4: Simplify right side
   678,820x = 2,033,179,402,816
5. Step 5: Solve for x
   x = 2,033,179,402,816/678,820
6. Step 6: Final answer
   x = 2,995,167.21