Finding the Third Proportional to 1,279,940 and 2,742,040

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279,940 : 2,742,040 = 2,742,040 : x
2. Step 2: Convert to fraction form
   1,279,940/2,742,040 = 2,742,040/x
3. Step 3: Cross multiply
   1,279,940x = 2,742,040 × 2,742,040
4. Step 4: Simplify right side
   1,279,940x = 7,518,783,361,600
5. Step 5: Solve for x
   x = 7,518,783,361,600/1,279,940
6. Step 6: Final answer
   x = 5,874,324.86