Finding the Third Proportional to 5,405,590 and 7,280,970

Step by Step Solution

1. Step 1: Write the proportion equation
   5,405,590 : 7,280,970 = 7,280,970 : x
2. Step 2: Convert to fraction form
   5,405,590/7,280,970 = 7,280,970/x
3. Step 3: Cross multiply
   5,405,590x = 7,280,970 × 7,280,970
4. Step 4: Simplify right side
   5,405,590x = 53,012,524,140,900
5. Step 5: Solve for x
   x = 53,012,524,140,900/5,405,590
6. Step 6: Final answer
   x = 9,806,982.06