Finding the Fourth Proportional to 2,938.75, 4,405.31 and 1,089.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,938.75 : 4,405.31 = 1,089.36 : x
2. Step 2: Convert to fraction form
   2,938.75/4,405.31 = 1,089.36/x
3. Step 3: Cross multiply
   2,938.75x = 4,405.31 × 1,089.36
4. Step 4: Simplify right side
   2,938.75x = 4,798,974.07
5. Step 5: Solve for x
   x = 4,798,974.07/2,938.75
6. Step 6: Final answer
   x = 1,633.00