Finding the Fourth Proportional to 2,649.88, 3,975.05 and 1,089.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.88 : 3,975.05 = 1,089.15 : x
2. Step 2: Convert to fraction form
   2,649.88/3,975.05 = 1,089.15/x
3. Step 3: Cross multiply
   2,649.88x = 3,975.05 × 1,089.15
4. Step 4: Simplify right side
   2,649.88x = 4,329,425.71
5. Step 5: Solve for x
   x = 4,329,425.71/2,649.88
6. Step 6: Final answer
   x = 1,633.82