Finding the Third Proportional to 4,799,976 and 10,139,520

Step by Step Solution

1. Step 1: Write the proportion equation
   4,799,976 : 10,139,520 = 10,139,520 : x
2. Step 2: Convert to fraction form
   4,799,976/10,139,520 = 10,139,520/x
3. Step 3: Cross multiply
   4,799,976x = 10,139,520 × 10,139,520
4. Step 4: Simplify right side
   4,799,976x = 102,809,865,830,400
5. Step 5: Solve for x
   x = 102,809,865,830,400/4,799,976
6. Step 6: Final answer
   x = 21,418,829.14