Finding the Fourth Proportional to 2,939.13, 4,405.89 and 1,089.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,939.13 : 4,405.89 = 1,089.75 : x
2. Step 2: Convert to fraction form
   2,939.13/4,405.89 = 1,089.75/x
3. Step 3: Cross multiply
   2,939.13x = 4,405.89 × 1,089.75
4. Step 4: Simplify right side
   2,939.13x = 4,801,335.15
5. Step 5: Solve for x
   x = 4,801,335.15/2,939.13
6. Step 6: Final answer
   x = 1,633.59