Finding the Fourth Proportional to 2,289.09, 3,158.72 and 1,404.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.09 : 3,158.72 = 1,404.75 : x
2. Step 2: Convert to fraction form
   2,289.09/3,158.72 = 1,404.75/x
3. Step 3: Cross multiply
   2,289.09x = 3,158.72 × 1,404.75
4. Step 4: Simplify right side
   2,289.09x = 4,437,204.90
5. Step 5: Solve for x
   x = 4,437,204.90/2,289.09
6. Step 6: Final answer
   x = 1,938.41