Finding the Third Proportional to 1,222,128 and 2,687,904

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,128 : 2,687,904 = 2,687,904 : x
2. Step 2: Convert to fraction form
   1,222,128/2,687,904 = 2,687,904/x
3. Step 3: Cross multiply
   1,222,128x = 2,687,904 × 2,687,904
4. Step 4: Simplify right side
   1,222,128x = 7,224,827,913,216
5. Step 5: Solve for x
   x = 7,224,827,913,216/1,222,128
6. Step 6: Final answer
   x = 5,911,678.57