Finding the Third Proportional to 1,215,869 and 1,776,904

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,869 : 1,776,904 = 1,776,904 : x
2. Step 2: Convert to fraction form
   1,215,869/1,776,904 = 1,776,904/x
3. Step 3: Cross multiply
   1,215,869x = 1,776,904 × 1,776,904
4. Step 4: Simplify right side
   1,215,869x = 3,157,387,825,216
5. Step 5: Solve for x
   x = 3,157,387,825,216/1,215,869
6. Step 6: Final answer
   x = 2,596,815.80