Finding the Third Proportional to 4,830,516 and 9,870,768

Step by Step Solution

1. Step 1: Write the proportion equation
   4,830,516 : 9,870,768 = 9,870,768 : x
2. Step 2: Convert to fraction form
   4,830,516/9,870,768 = 9,870,768/x
3. Step 3: Cross multiply
   4,830,516x = 9,870,768 × 9,870,768
4. Step 4: Simplify right side
   4,830,516x = 97,432,060,909,824
5. Step 5: Solve for x
   x = 97,432,060,909,824/4,830,516
6. Step 6: Final answer
   x = 20,170,114.52