Finding the Fourth Proportional to 2,648.17, 3,972.71 and 1,089.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.17 : 3,972.71 = 1,089.03 : x
2. Step 2: Convert to fraction form
   2,648.17/3,972.71 = 1,089.03/x
3. Step 3: Cross multiply
   2,648.17x = 3,972.71 × 1,089.03
4. Step 4: Simplify right side
   2,648.17x = 4,326,403.09
5. Step 5: Solve for x
   x = 4,326,403.09/2,648.17
6. Step 6: Final answer
   x = 1,633.73