Finding the Third Proportional to 1,248,644 and 2,686,786

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248,644 : 2,686,786 = 2,686,786 : x
2. Step 2: Convert to fraction form
   1,248,644/2,686,786 = 2,686,786/x
3. Step 3: Cross multiply
   1,248,644x = 2,686,786 × 2,686,786
4. Step 4: Simplify right side
   1,248,644x = 7,218,819,009,796
5. Step 5: Solve for x
   x = 7,218,819,009,796/1,248,644
6. Step 6: Final answer
   x = 5,781,326.79