Finding the Third Proportional to 686,040 and 1,603,320

Step by Step Solution

1. Step 1: Write the proportion equation
   686,040 : 1,603,320 = 1,603,320 : x
2. Step 2: Convert to fraction form
   686,040/1,603,320 = 1,603,320/x
3. Step 3: Cross multiply
   686,040x = 1,603,320 × 1,603,320
4. Step 4: Simplify right side
   686,040x = 2,570,635,022,400
5. Step 5: Solve for x
   x = 2,570,635,022,400/686,040
6. Step 6: Final answer
   x = 3,747,062.89