Finding the Third Proportional to 2,989,640 and 7,018,656

Step by Step Solution

1. Step 1: Write the proportion equation
   2,989,640 : 7,018,656 = 7,018,656 : x
2. Step 2: Convert to fraction form
   2,989,640/7,018,656 = 7,018,656/x
3. Step 3: Cross multiply
   2,989,640x = 7,018,656 × 7,018,656
4. Step 4: Simplify right side
   2,989,640x = 49,261,532,046,336
5. Step 5: Solve for x
   x = 49,261,532,046,336/2,989,640
6. Step 6: Final answer
   x = 16,477,412.68