Finding the Third Proportional to 988,580 and 2,158,384

Step by Step Solution

1. Step 1: Write the proportion equation
   988,580 : 2,158,384 = 2,158,384 : x
2. Step 2: Convert to fraction form
   988,580/2,158,384 = 2,158,384/x
3. Step 3: Cross multiply
   988,580x = 2,158,384 × 2,158,384
4. Step 4: Simplify right side
   988,580x = 4,658,621,491,456
5. Step 5: Solve for x
   x = 4,658,621,491,456/988,580
6. Step 6: Final answer
   x = 4,712,437.53