Finding the Third Proportional to 917,871 and 1,988,256

Step by Step Solution

1. Step 1: Write the proportion equation
   917,871 : 1,988,256 = 1,988,256 : x
2. Step 2: Convert to fraction form
   917,871/1,988,256 = 1,988,256/x
3. Step 3: Cross multiply
   917,871x = 1,988,256 × 1,988,256
4. Step 4: Simplify right side
   917,871x = 3,953,161,921,536
5. Step 5: Solve for x
   x = 3,953,161,921,536/917,871
6. Step 6: Final answer
   x = 4,306,881.82