Finding the Third Proportional to 988,607 and 2,158,438

Step by Step Solution

1. Step 1: Write the proportion equation
   988,607 : 2,158,438 = 2,158,438 : x
2. Step 2: Convert to fraction form
   988,607/2,158,438 = 2,158,438/x
3. Step 3: Cross multiply
   988,607x = 2,158,438 × 2,158,438
4. Step 4: Simplify right side
   988,607x = 4,658,854,599,844
5. Step 5: Solve for x
   x = 4,658,854,599,844/988,607
6. Step 6: Final answer
   x = 4,712,544.62