Finding the Third Proportional to 991,940 and 2,161,028

Step by Step Solution

1. Step 1: Write the proportion equation
   991,940 : 2,161,028 = 2,161,028 : x
2. Step 2: Convert to fraction form
   991,940/2,161,028 = 2,161,028/x
3. Step 3: Cross multiply
   991,940x = 2,161,028 × 2,161,028
4. Step 4: Simplify right side
   991,940x = 4,670,042,016,784
5. Step 5: Solve for x
   x = 4,670,042,016,784/991,940
6. Step 6: Final answer
   x = 4,707,988.40