Finding the Fourth Proportional to 2,939.09, 4,407.89 and 1,089.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,939.09 : 4,407.89 = 1,089.18 : x
2. Step 2: Convert to fraction form
   2,939.09/4,407.89 = 1,089.18/x
3. Step 3: Cross multiply
   2,939.09x = 4,407.89 × 1,089.18
4. Step 4: Simplify right side
   2,939.09x = 4,800,980.18
5. Step 5: Solve for x
   x = 4,800,980.18/2,939.09
6. Step 6: Final answer
   x = 1,633.49