Finding the Third Proportional to 1,279,692 and 2,800,440

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279,692 : 2,800,440 = 2,800,440 : x
2. Step 2: Convert to fraction form
   1,279,692/2,800,440 = 2,800,440/x
3. Step 3: Cross multiply
   1,279,692x = 2,800,440 × 2,800,440
4. Step 4: Simplify right side
   1,279,692x = 7,842,464,193,600
5. Step 5: Solve for x
   x = 7,842,464,193,600/1,279,692
6. Step 6: Final answer
   x = 6,128,399.80