Finding the Fourth Proportional to 3,745.71, 5,618.56 and 1,280.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,745.71 : 5,618.56 = 1,280.55 : x
2. Step 2: Convert to fraction form
   3,745.71/5,618.56 = 1,280.55/x
3. Step 3: Cross multiply
   3,745.71x = 5,618.56 × 1,280.55
4. Step 4: Simplify right side
   3,745.71x = 7,194,847.01
5. Step 5: Solve for x
   x = 7,194,847.01/3,745.71
6. Step 6: Final answer
   x = 1,920.82