Finding the Fourth Proportional to 2,648.98, 3,972.81 and 1,089.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.98 : 3,972.81 = 1,089.42 : x
2. Step 2: Convert to fraction form
   2,648.98/3,972.81 = 1,089.42/x
3. Step 3: Cross multiply
   2,648.98x = 3,972.81 × 1,089.42
4. Step 4: Simplify right side
   2,648.98x = 4,328,039.69
5. Step 5: Solve for x
   x = 4,328,039.69/2,648.98
6. Step 6: Final answer
   x = 1,633.85