Finding the Third Proportional to 1,278,400 and 2,840,576

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,400 : 2,840,576 = 2,840,576 : x
2. Step 2: Convert to fraction form
   1,278,400/2,840,576 = 2,840,576/x
3. Step 3: Cross multiply
   1,278,400x = 2,840,576 × 2,840,576
4. Step 4: Simplify right side
   1,278,400x = 8,068,872,011,776
5. Step 5: Solve for x
   x = 8,068,872,011,776/1,278,400
6. Step 6: Final answer
   x = 6,311,695.88