Finding the Third Proportional to 4,707,846 and 9,980,640

Step by Step Solution

1. Step 1: Write the proportion equation
   4,707,846 : 9,980,640 = 9,980,640 : x
2. Step 2: Convert to fraction form
   4,707,846/9,980,640 = 9,980,640/x
3. Step 3: Cross multiply
   4,707,846x = 9,980,640 × 9,980,640
4. Step 4: Simplify right side
   4,707,846x = 99,613,174,809,600
5. Step 5: Solve for x
   x = 99,613,174,809,600/4,707,846
6. Step 6: Final answer
   x = 21,158,970.54