Finding the Third Proportional to 998,490 and 2,187,039

Step by Step Solution

1. Step 1: Write the proportion equation
   998,490 : 2,187,039 = 2,187,039 : x
2. Step 2: Convert to fraction form
   998,490/2,187,039 = 2,187,039/x
3. Step 3: Cross multiply
   998,490x = 2,187,039 × 2,187,039
4. Step 4: Simplify right side
   998,490x = 4,783,139,587,521
5. Step 5: Solve for x
   x = 4,783,139,587,521/998,490
6. Step 6: Final answer
   x = 4,790,373.05