Finding the Third Proportional to 4,830,628 and 9,870,992

Step by Step Solution

1. Step 1: Write the proportion equation
   4,830,628 : 9,870,992 = 9,870,992 : x
2. Step 2: Convert to fraction form
   4,830,628/9,870,992 = 9,870,992/x
3. Step 3: Cross multiply
   4,830,628x = 9,870,992 × 9,870,992
4. Step 4: Simplify right side
   4,830,628x = 97,436,483,064,064
5. Step 5: Solve for x
   x = 97,436,483,064,064/4,830,628
6. Step 6: Final answer
   x = 20,170,562.31