Finding the Third Proportional to 1,278,720 and 2,798,250

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,720 : 2,798,250 = 2,798,250 : x
2. Step 2: Convert to fraction form
   1,278,720/2,798,250 = 2,798,250/x
3. Step 3: Cross multiply
   1,278,720x = 2,798,250 × 2,798,250
4. Step 4: Simplify right side
   1,278,720x = 7,830,203,062,500
5. Step 5: Solve for x
   x = 7,830,203,062,500/1,278,720
6. Step 6: Final answer
   x = 6,123,469.61