Finding the Fourth Proportional to 2,647.86, 3,969.96 and 1,260.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.86 : 3,969.96 = 1,260.14 : x
2. Step 2: Convert to fraction form
   2,647.86/3,969.96 = 1,260.14/x
3. Step 3: Cross multiply
   2,647.86x = 3,969.96 × 1,260.14
4. Step 4: Simplify right side
   2,647.86x = 5,002,685.54
5. Step 5: Solve for x
   x = 5,002,685.54/2,647.86
6. Step 6: Final answer
   x = 1,889.33