Finding the Third Proportional to 921,778 and 1,917,132

Step by Step Solution

1. Step 1: Write the proportion equation
   921,778 : 1,917,132 = 1,917,132 : x
2. Step 2: Convert to fraction form
   921,778/1,917,132 = 1,917,132/x
3. Step 3: Cross multiply
   921,778x = 1,917,132 × 1,917,132
4. Step 4: Simplify right side
   921,778x = 3,675,395,105,424
5. Step 5: Solve for x
   x = 3,675,395,105,424/921,778
6. Step 6: Final answer
   x = 3,987,288.81