Finding the Third Proportional to 2,120,640 and 4,557,696

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120,640 : 4,557,696 = 4,557,696 : x
2. Step 2: Convert to fraction form
   2,120,640/4,557,696 = 4,557,696/x
3. Step 3: Cross multiply
   2,120,640x = 4,557,696 × 4,557,696
4. Step 4: Simplify right side
   2,120,640x = 20,772,592,828,416
5. Step 5: Solve for x
   x = 20,772,592,828,416/2,120,640
6. Step 6: Final answer
   x = 9,795,435.73