Finding the Third Proportional to 1,991,957 and 4,321,684

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991,957 : 4,321,684 = 4,321,684 : x
2. Step 2: Convert to fraction form
   1,991,957/4,321,684 = 4,321,684/x
3. Step 3: Cross multiply
   1,991,957x = 4,321,684 × 4,321,684
4. Step 4: Simplify right side
   1,991,957x = 18,676,952,595,856
5. Step 5: Solve for x
   x = 18,676,952,595,856/1,991,957
6. Step 6: Final answer
   x = 9,376,182.62