Finding the Third Proportional to 4,707,938 and 9,980,910

Step by Step Solution

1. Step 1: Write the proportion equation
   4,707,938 : 9,980,910 = 9,980,910 : x
2. Step 2: Convert to fraction form
   4,707,938/9,980,910 = 9,980,910/x
3. Step 3: Cross multiply
   4,707,938x = 9,980,910 × 9,980,910
4. Step 4: Simplify right side
   4,707,938x = 99,618,564,428,100
5. Step 5: Solve for x
   x = 99,618,564,428,100/4,707,938
6. Step 6: Final answer
   x = 21,159,701.85