Finding the Third Proportional to 641,990 and 1,355,606

Step by Step Solution

1. Step 1: Write the proportion equation
   641,990 : 1,355,606 = 1,355,606 : x
2. Step 2: Convert to fraction form
   641,990/1,355,606 = 1,355,606/x
3. Step 3: Cross multiply
   641,990x = 1,355,606 × 1,355,606
4. Step 4: Simplify right side
   641,990x = 1,837,667,627,236
5. Step 5: Solve for x
   x = 1,837,667,627,236/641,990
6. Step 6: Final answer
   x = 2,862,455.22