Finding the Third Proportional to 3,405,840 and 5,079,240

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405,840 : 5,079,240 = 5,079,240 : x
2. Step 2: Convert to fraction form
   3,405,840/5,079,240 = 5,079,240/x
3. Step 3: Cross multiply
   3,405,840x = 5,079,240 × 5,079,240
4. Step 4: Simplify right side
   3,405,840x = 25,798,678,977,600
5. Step 5: Solve for x
   x = 25,798,678,977,600/3,405,840
6. Step 6: Final answer
   x = 7,574,835.86