Finding the Fourth Proportional to 2,649.89, 3,974.73 and 1,089.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.89 : 3,974.73 = 1,089.45 : x
2. Step 2: Convert to fraction form
   2,649.89/3,974.73 = 1,089.45/x
3. Step 3: Cross multiply
   2,649.89x = 3,974.73 × 1,089.45
4. Step 4: Simplify right side
   2,649.89x = 4,330,280.42
5. Step 5: Solve for x
   x = 4,330,280.42/2,649.89
6. Step 6: Final answer
   x = 1,634.14