Finding the Third Proportional to 988,584 and 2,158,392

Step by Step Solution

1. Step 1: Write the proportion equation
   988,584 : 2,158,392 = 2,158,392 : x
2. Step 2: Convert to fraction form
   988,584/2,158,392 = 2,158,392/x
3. Step 3: Cross multiply
   988,584x = 2,158,392 × 2,158,392
4. Step 4: Simplify right side
   988,584x = 4,658,656,025,664
5. Step 5: Solve for x
   x = 4,658,656,025,664/988,584
6. Step 6: Final answer
   x = 4,712,453.39