Finding the Third Proportional to 1,998,920 and 4,370,656

Step by Step Solution

1. Step 1: Write the proportion equation
   1,998,920 : 4,370,656 = 4,370,656 : x
2. Step 2: Convert to fraction form
   1,998,920/4,370,656 = 4,370,656/x
3. Step 3: Cross multiply
   1,998,920x = 4,370,656 × 4,370,656
4. Step 4: Simplify right side
   1,998,920x = 19,102,633,870,336
5. Step 5: Solve for x
   x = 19,102,633,870,336/1,998,920
6. Step 6: Final answer
   x = 9,556,477.43