Finding the Fourth Proportional to 2,939.31, 4,405.50 and 1,089.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,939.31 : 4,405.50 = 1,089.48 : x
2. Step 2: Convert to fraction form
   2,939.31/4,405.50 = 1,089.48/x
3. Step 3: Cross multiply
   2,939.31x = 4,405.50 × 1,089.48
4. Step 4: Simplify right side
   2,939.31x = 4,799,704.14
5. Step 5: Solve for x
   x = 4,799,704.14/2,939.31
6. Step 6: Final answer
   x = 1,632.94