Finding the Fourth Proportional to 2,649.56, 3,969.17 and 1,260.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.56 : 3,969.17 = 1,260.99 : x
2. Step 2: Convert to fraction form
   2,649.56/3,969.17 = 1,260.99/x
3. Step 3: Cross multiply
   2,649.56x = 3,969.17 × 1,260.99
4. Step 4: Simplify right side
   2,649.56x = 5,005,086.83
5. Step 5: Solve for x
   x = 5,005,086.83/2,649.56
6. Step 6: Final answer
   x = 1,889.02