Finding the Third Proportional to 1,288,266 and 2,798,513

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288,266 : 2,798,513 = 2,798,513 : x
2. Step 2: Convert to fraction form
   1,288,266/2,798,513 = 2,798,513/x
3. Step 3: Cross multiply
   1,288,266x = 2,798,513 × 2,798,513
4. Step 4: Simplify right side
   1,288,266x = 7,831,675,011,169
5. Step 5: Solve for x
   x = 7,831,675,011,169/1,288,266
6. Step 6: Final answer
   x = 6,079,237.53