Finding the Third Proportional to 5,405,540 and 7,280,892

Step by Step Solution

1. Step 1: Write the proportion equation
   5,405,540 : 7,280,892 = 7,280,892 : x
2. Step 2: Convert to fraction form
   5,405,540/7,280,892 = 7,280,892/x
3. Step 3: Cross multiply
   5,405,540x = 7,280,892 × 7,280,892
4. Step 4: Simplify right side
   5,405,540x = 53,011,388,315,664
5. Step 5: Solve for x
   x = 53,011,388,315,664/5,405,540
6. Step 6: Final answer
   x = 9,806,862.65