Finding the Third Proportional to 3,578,973 and 5,420,556

Step by Step Solution

1. Step 1: Write the proportion equation
   3,578,973 : 5,420,556 = 5,420,556 : x
2. Step 2: Convert to fraction form
   3,578,973/5,420,556 = 5,420,556/x
3. Step 3: Cross multiply
   3,578,973x = 5,420,556 × 5,420,556
4. Step 4: Simplify right side
   3,578,973x = 29,382,427,349,136
5. Step 5: Solve for x
   x = 29,382,427,349,136/3,578,973
6. Step 6: Final answer
   x = 8,209,737.08