Finding the Fourth Proportional to 2,647.75, 3,969.04 and 1,260.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.75 : 3,969.04 = 1,260.71 : x
2. Step 2: Convert to fraction form
   2,647.75/3,969.04 = 1,260.71/x
3. Step 3: Cross multiply
   2,647.75x = 3,969.04 × 1,260.71
4. Step 4: Simplify right side
   2,647.75x = 5,003,828.54
5. Step 5: Solve for x
   x = 5,003,828.54/2,647.75
6. Step 6: Final answer
   x = 1,889.84