Finding the Third Proportional to 1,139,151 and 2,505,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,151 : 2,505,678 = 2,505,678 : x
2. Step 2: Convert to fraction form
   1,139,151/2,505,678 = 2,505,678/x
3. Step 3: Cross multiply
   1,139,151x = 2,505,678 × 2,505,678
4. Step 4: Simplify right side
   1,139,151x = 6,278,422,239,684
5. Step 5: Solve for x
   x = 6,278,422,239,684/1,139,151
6. Step 6: Final answer
   x = 5,511,492.54