Finding the Fourth Proportional to 2,653.89, 3,980.02 and 1,266.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,653.89 : 3,980.02 = 1,266.49 : x
2. Step 2: Convert to fraction form
   2,653.89/3,980.02 = 1,266.49/x
3. Step 3: Cross multiply
   2,653.89x = 3,980.02 × 1,266.49
4. Step 4: Simplify right side
   2,653.89x = 5,040,655.53
5. Step 5: Solve for x
   x = 5,040,655.53/2,653.89
6. Step 6: Final answer
   x = 1,899.35