Finding the Third Proportional to 1,278,402 and 2,840,580

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,402 : 2,840,580 = 2,840,580 : x
2. Step 2: Convert to fraction form
   1,278,402/2,840,580 = 2,840,580/x
3. Step 3: Cross multiply
   1,278,402x = 2,840,580 × 2,840,580
4. Step 4: Simplify right side
   1,278,402x = 8,068,894,736,400
5. Step 5: Solve for x
   x = 8,068,894,736,400/1,278,402
6. Step 6: Final answer
   x = 6,311,703.78