Finding the Fourth Proportional to 2,643.38, 3,647.25 and 1,580.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.38 : 3,647.25 = 1,580.94 : x
2. Step 2: Convert to fraction form
   2,643.38/3,647.25 = 1,580.94/x
3. Step 3: Cross multiply
   2,643.38x = 3,647.25 × 1,580.94
4. Step 4: Simplify right side
   2,643.38x = 5,766,083.42
5. Step 5: Solve for x
   x = 5,766,083.42/2,643.38
6. Step 6: Final answer
   x = 2,181.33