Finding the Third Proportional to 984,990 and 2,156,816

Step by Step Solution

1. Step 1: Write the proportion equation
   984,990 : 2,156,816 = 2,156,816 : x
2. Step 2: Convert to fraction form
   984,990/2,156,816 = 2,156,816/x
3. Step 3: Cross multiply
   984,990x = 2,156,816 × 2,156,816
4. Step 4: Simplify right side
   984,990x = 4,651,855,257,856
5. Step 5: Solve for x
   x = 4,651,855,257,856/984,990
6. Step 6: Final answer
   x = 4,722,743.64