Finding the Third Proportional to 988,605 and 2,158,434

Step by Step Solution

1. Step 1: Write the proportion equation
   988,605 : 2,158,434 = 2,158,434 : x
2. Step 2: Convert to fraction form
   988,605/2,158,434 = 2,158,434/x
3. Step 3: Cross multiply
   988,605x = 2,158,434 × 2,158,434
4. Step 4: Simplify right side
   988,605x = 4,658,837,332,356
5. Step 5: Solve for x
   x = 4,658,837,332,356/988,605
6. Step 6: Final answer
   x = 4,712,536.69