Finding the Third Proportional to 1,287,240 and 2,776,812

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,240 : 2,776,812 = 2,776,812 : x
2. Step 2: Convert to fraction form
   1,287,240/2,776,812 = 2,776,812/x
3. Step 3: Cross multiply
   1,287,240x = 2,776,812 × 2,776,812
4. Step 4: Simplify right side
   1,287,240x = 7,710,684,883,344
5. Step 5: Solve for x
   x = 7,710,684,883,344/1,287,240
6. Step 6: Final answer
   x = 5,990,091.11