Finding the Third Proportional to 988,686 and 2,158,596

Step by Step Solution

1. Step 1: Write the proportion equation
   988,686 : 2,158,596 = 2,158,596 : x
2. Step 2: Convert to fraction form
   988,686/2,158,596 = 2,158,596/x
3. Step 3: Cross multiply
   988,686x = 2,158,596 × 2,158,596
4. Step 4: Simplify right side
   988,686x = 4,659,536,691,216
5. Step 5: Solve for x
   x = 4,659,536,691,216/988,686
6. Step 6: Final answer
   x = 4,712,857.97