Finding the Third Proportional to 855,040 and 1,353,860

Step by Step Solution

1. Step 1: Write the proportion equation
   855,040 : 1,353,860 = 1,353,860 : x
2. Step 2: Convert to fraction form
   855,040/1,353,860 = 1,353,860/x
3. Step 3: Cross multiply
   855,040x = 1,353,860 × 1,353,860
4. Step 4: Simplify right side
   855,040x = 1,832,936,899,600
5. Step 5: Solve for x
   x = 1,832,936,899,600/855,040
6. Step 6: Final answer
   x = 2,143,685.56